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padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Advanced Guides</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Monitoring DataHub</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Monitoring DataHub</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="overview">Overview<a href="#overview" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h2><p>Monitoring DataHub's system components is essential for maintaining operational excellence, troubleshooting performance issues,
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and ensuring system reliability. This comprehensive guide covers how to implement observability in DataHub through tracing and metrics,
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and how to extract valuable insights from your running instances.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="why-monitor-datahub">Why Monitor DataHub?<a href="#why-monitor-datahub" class="hash-link" aria-label="Direct link to Why Monitor DataHub?" title="Direct link to Why Monitor DataHub?"></a></h2><p>Effective monitoring enables you to:</p><ul><li>Identify Performance Bottlenecks: Pinpoint slow queries or API endpoints</li><li>Debug Issues Faster: Trace requests across distributed components to locate failures</li><li>Meet SLAs: Track and alert on key performance indicators</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="observability-components">Observability Components<a href="#observability-components" class="hash-link" aria-label="Direct link to Observability Components" title="Direct link to Observability Components"></a></h2><p>DataHub's observability strategy consists of two complementary approaches:</p><ol><li><p>Metrics Collection</p><p><strong>Purpose:</strong> Aggregate statistical data about system behavior over time
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<strong>Technology:</strong> Transitioning from DropWizard/JMX to Micrometer</p><p><strong>Current State:</strong> DropWizard metrics exposed via JMX, collected by Prometheus
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<strong>Future Direction:</strong> Native Micrometer integration for Spring-based metrics
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<strong>Compatibility:</strong> Prometheus-compatible format with support for other metrics backends</p><p>Key Metrics Categories:</p><ul><li>Performance Metrics: Request latency, throughput, error rates</li><li>Resource Metrics: CPU, memory utilization</li><li>Application Metrics: Cache hit rates, queue depths, processing times</li><li>Business Metrics: Entity counts, ingestion rates, search performance</li></ul></li><li><p>Distributed Tracing</p><p><strong>Purpose:</strong> Track individual requests as they flow through multiple services and components
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<strong>Technology:</strong> OpenTelemetry-based instrumentation</p><ul><li>Provides end-to-end visibility of request lifecycles</li><li>Automatically instruments popular libraries (Kafka, JDBC, Elasticsearch)</li><li>Supports multiple backend systems (Jaeger, Zipkin, etc.)</li><li>Enables custom span creation with minimal code changes</li></ul><p>Key Benefits:</p><ul><li>Visualize request flow across microservices</li><li>Identify latency hotspots</li><li>Understand service dependencies</li><li>Debug complex distributed transactions</li></ul></li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="graphql-instrumentation-micrometer">GraphQL Instrumentation (Micrometer)<a href="#graphql-instrumentation-micrometer" class="hash-link" aria-label="Direct link to GraphQL Instrumentation (Micrometer)" title="Direct link to GraphQL Instrumentation (Micrometer)"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="overview-1">Overview<a href="#overview-1" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h3><p>DataHub provides comprehensive instrumentation for its GraphQL API through Micrometer metrics, enabling detailed performance
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monitoring and debugging capabilities. The instrumentation system offers flexible configuration options to balance between
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observability depth and performance overhead.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="why-path-level-graphql-instrumentation-matters">Why Path-Level GraphQL Instrumentation Matters<a href="#why-path-level-graphql-instrumentation-matters" class="hash-link" aria-label="Direct link to Why Path-Level GraphQL Instrumentation Matters" title="Direct link to Why Path-Level GraphQL Instrumentation Matters"></a></h3><p>Traditional GraphQL monitoring only tells you "the search query is slow" but not <strong>why</strong>. Without path-level instrumentation,
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you're blind to which specific fields are causing performance bottlenecks in complex nested queries.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="real-world-example">Real-World Example<a href="#real-world-example" class="hash-link" aria-label="Direct link to Real-World Example" title="Direct link to Real-World Example"></a></h3><p>Consider this GraphQL query:</p><div class="language-graphql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-graphql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">query</span><span class="token plain"> </span><span class="token definition-query function" style="color:rgb(130, 170, 255)">getSearchResults</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property-query">search</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token attr-name" style="color:rgb(255, 203, 107)">input</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"> </span><span class="token attr-name" style="color:rgb(255, 203, 107)">query</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"sales data"</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">searchResults</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">entity</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">...</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">on</span><span class="token plain"> </span><span class="token class-name" style="color:rgb(255, 203, 107)">Dataset</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">name</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">owner</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Path: /search/searchResults/entity/owner</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">corpUser</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">displayName</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">lineage</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Path: /search/searchResults/entity/lineage</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">upstreamCount</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">downstreamCount</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">upstreamEntities</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">urn</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">name</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">schemaMetadata</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Path: /search/searchResults/entity/schemaMetadata</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token object">fields</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">fieldPath</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">description</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="what-path-level-instrumentation-reveals">What Path-Level Instrumentation Reveals<a href="#what-path-level-instrumentation-reveals" class="hash-link" aria-label="Direct link to What Path-Level Instrumentation Reveals" title="Direct link to What Path-Level Instrumentation Reveals"></a></h3><p>With path-level metrics, you discover:</p><ul><li><code>/search/searchResults/entity/owner</code> - 50ms (fast, well-cached)</li><li><code>/search/searchResults/entity/lineage</code> - 2500ms (SLOW! hitting graph database)</li><li><code>/search/searchResults/entity/schemaMetadata</code> - 150ms (acceptable)</li></ul><p><strong>Without path metrics</strong>: "Search query takes 3 seconds"<br>
|
||
<strong>With path metrics</strong>: "Lineage resolution is the bottleneck"</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="key-benefits">Key Benefits<a href="#key-benefits" class="hash-link" aria-label="Direct link to Key Benefits" title="Direct link to Key Benefits"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="1-surgical-optimization">1. <strong>Surgical Optimization</strong><a href="#1-surgical-optimization" class="hash-link" aria-label="Direct link to 1-surgical-optimization" title="Direct link to 1-surgical-optimization"></a></h4><p>Instead of guessing, you know exactly which resolver needs optimization. Maybe lineage needs better caching or pagination.</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="2-smart-query-patterns">2. <strong>Smart Query Patterns</strong><a href="#2-smart-query-patterns" class="hash-link" aria-label="Direct link to 2-smart-query-patterns" title="Direct link to 2-smart-query-patterns"></a></h4><p>Identify expensive patterns like:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># These paths consistently slow:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/</span><span class="token important">*/lineage/upstreamEntities/*</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/</span><span class="token important">*/siblings/*/platform</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Action: Add field-level caching or lazy loading</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="3-client-specific-debugging">3. <strong>Client-Specific Debugging</strong><a href="#3-client-specific-debugging" class="hash-link" aria-label="Direct link to 3-client-specific-debugging" title="Direct link to 3-client-specific-debugging"></a></h4><p>Different clients request different fields. Path instrumentation shows:</p><ul><li>Web UI requests are slow (requesting everything)</li><li>API integrations timeout (requesting deep lineage)</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="4-n1-query-detection">4. <strong>N+1 Query Detection</strong><a href="#4-n1-query-detection" class="hash-link" aria-label="Direct link to 4-n1-query-detection" title="Direct link to 4-n1-query-detection"></a></h4><p>Spot resolver patterns that indicate N+1 problems:</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">/users/0/permissions - 10ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/users/1/permissions - 10ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/users/2/permissions - 10ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">... (100 more times)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="configuration-strategy">Configuration Strategy<a href="#configuration-strategy" class="hash-link" aria-label="Direct link to Configuration Strategy" title="Direct link to Configuration Strategy"></a></h3><p>Start targeted to minimize overhead:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Focus on known slow operations</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"searchAcrossEntities,getDataset"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Target expensive resolver paths</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelPaths</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"/**/lineage/**,/**/relationships/**,/**/privileges"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="architecture">Architecture<a href="#architecture" class="hash-link" aria-label="Direct link to Architecture" title="Direct link to Architecture"></a></h3><p>The GraphQL instrumentation is implemented through <code>GraphQLTimingInstrumentation</code>, which extends GraphQL Java's instrumentation framework. It provides:</p><ul><li><strong>Request-level metrics</strong>: Overall query performance and error tracking</li><li><strong>Field-level metrics</strong>: Detailed timing for individual field resolvers</li><li><strong>Smart filtering</strong>: Configurable targeting of specific operations or field paths</li><li><strong>Low overhead</strong>: Minimal performance impact through efficient instrumentation</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="metrics-collected">Metrics Collected<a href="#metrics-collected" class="hash-link" aria-label="Direct link to Metrics Collected" title="Direct link to Metrics Collected"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="request-level-metrics">Request-Level Metrics<a href="#request-level-metrics" class="hash-link" aria-label="Direct link to Request-Level Metrics" title="Direct link to Request-Level Metrics"></a></h4><p><strong>Metric: <code>graphql.request.duration</code></strong></p><ul><li><strong>Type</strong>: Timer with percentiles (p50, p95, p99)</li><li><strong>Tags</strong>:<ul><li><code>operation</code>: Operation name (e.g., "getSearchResultsForMultiple")</li><li><code>operation.type</code>: Query, mutation, or subscription</li><li><code>success</code>: true/false based on error presence</li><li><code>field.filtering</code>: Filtering mode applied (DISABLED, ALL_FIELDS, BY_OPERATION, BY_PATH, BY_BOTH)</li></ul></li><li><strong>Use Case</strong>: Monitor overall GraphQL performance, identify slow operations</li></ul><p><strong>Metric: <code>graphql.request.errors</code></strong></p><ul><li><strong>Type</strong>: Counter</li><li><strong>Tags</strong>:<ul><li><code>operation</code>: Operation name</li><li><code>operation.type</code>: Query, mutation, or subscription</li></ul></li><li><strong>Use Case</strong>: Track error rates by operation</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="field-level-metrics">Field-Level Metrics<a href="#field-level-metrics" class="hash-link" aria-label="Direct link to Field-Level Metrics" title="Direct link to Field-Level Metrics"></a></h4><p><strong>Metric: <code>graphql.field.duration</code></strong></p><ul><li><strong>Type</strong>: Timer with percentiles (p50, p95, p99)</li><li><strong>Tags</strong>:<ul><li><code>parent.type</code>: GraphQL parent type (e.g., "Dataset", "User")</li><li><code>field</code>: Field name being resolved</li><li><code>operation</code>: Operation name context</li><li><code>success</code>: true/false</li><li><code>path</code>: Field path (optional, controlled by <code>fieldLevelPathEnabled</code>)</li></ul></li><li><strong>Use Case</strong>: Identify slow field resolvers, optimize data fetching</li></ul><p><strong>Metric: <code>graphql.field.errors</code></strong></p><ul><li><strong>Type</strong>: Counter</li><li><strong>Tags</strong>: Same as field duration (minus success tag)</li><li><strong>Use Case</strong>: Track field-specific error patterns</li></ul><p><strong>Metric: <code>graphql.fields.instrumented</code></strong></p><ul><li><strong>Type</strong>: Counter</li><li><strong>Tags</strong>:<ul><li><code>operation</code>: Operation name</li><li><code>filtering.mode</code>: Active filtering mode</li></ul></li><li><strong>Use Case</strong>: Monitor instrumentation coverage and overhead</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="configuration-guide">Configuration Guide<a href="#configuration-guide" class="hash-link" aria-label="Direct link to Configuration Guide" title="Direct link to Configuration Guide"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="master-controls">Master Controls<a href="#master-controls" class="hash-link" aria-label="Direct link to Master Controls" title="Direct link to Master Controls"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">graphQL</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">metrics</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Master switch for all GraphQL metrics</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> $</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">GRAPHQL_METRICS_ENABLED</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Enable field-level resolver metrics</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> $</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">GRAPHQL_METRICS_FIELD_LEVEL_ENABLED</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="selective-field-instrumentation">Selective Field Instrumentation<a href="#selective-field-instrumentation" class="hash-link" aria-label="Direct link to Selective Field Instrumentation" title="Direct link to Selective Field Instrumentation"></a></h4><p>Field-level metrics can add significant overhead for complex queries. DataHub provides multiple strategies to control which fields are instrumented:</p><h5 class="anchor anchorWithStickyNavbar_LWe7" id="1-operation-based-filtering">1. <strong>Operation-Based Filtering</strong><a href="#1-operation-based-filtering" class="hash-link" aria-label="Direct link to 1-operation-based-filtering" title="Direct link to 1-operation-based-filtering"></a></h5><p>Target specific GraphQL operations known to be slow or critical:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"getSearchResultsForMultiple,searchAcrossLineageStructure"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h5 class="anchor anchorWithStickyNavbar_LWe7" id="2-path-based-filtering">2. <strong>Path-Based Filtering</strong><a href="#2-path-based-filtering" class="hash-link" aria-label="Direct link to 2-path-based-filtering" title="Direct link to 2-path-based-filtering"></a></h5><p>Use path patterns to instrument specific parts of your schema:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelPaths</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"/search/results/**,/user/*/permissions,/**/lineage/*"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p><strong>Path Pattern Syntax</strong>:</p><ul><li><code>/user</code> - Exact match for the user field</li><li><code>/user/*</code> - Direct children of user (e.g., <code>/user/name</code>, <code>/user/email</code>)</li><li><code>/user/**</code> - User field and all descendants at any depth</li><li><code>/*/comments/*</code> - Comments field under any parent</li></ul><h5 class="anchor anchorWithStickyNavbar_LWe7" id="3-combined-filtering">3. <strong>Combined Filtering</strong><a href="#3-combined-filtering" class="hash-link" aria-label="Direct link to 3-combined-filtering" title="Direct link to 3-combined-filtering"></a></h5><p>When both operation and path filters are configured, only fields matching BOTH criteria are instrumented:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Only instrument search results within specific operations</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"searchAcrossEntities"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelPaths</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"/searchResults/**"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="advanced-options">Advanced Options<a href="#advanced-options" class="hash-link" aria-label="Direct link to Advanced Options" title="Direct link to Advanced Options"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Include field paths as metric tags (WARNING: high cardinality risk)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelPathEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Include metrics for trivial property access</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">trivialDataFetchersEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="filtering-modes-explained">Filtering Modes Explained<a href="#filtering-modes-explained" class="hash-link" aria-label="Direct link to Filtering Modes Explained" title="Direct link to Filtering Modes Explained"></a></h3><p>The instrumentation automatically determines the most efficient filtering mode:</p><ol><li><strong>DISABLED</strong>: Field-level metrics completely disabled</li><li><strong>ALL_FIELDS</strong>: No filtering, all fields instrumented (highest overhead)</li><li><strong>BY_OPERATION</strong>: Only instrument fields within specified operations</li><li><strong>BY_PATH</strong>: Only instrument fields matching path patterns</li><li><strong>BY_BOTH</strong>: Most restrictive - both operation and path must match</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="performance-considerations">Performance Considerations<a href="#performance-considerations" class="hash-link" aria-label="Direct link to Performance Considerations" title="Direct link to Performance Considerations"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="impact-assessment">Impact Assessment<a href="#impact-assessment" class="hash-link" aria-label="Direct link to Impact Assessment" title="Direct link to Impact Assessment"></a></h4><p>Field-level instrumentation overhead varies by:</p><ul><li><strong>Query complexity</strong>: More fields = more overhead</li><li><strong>Resolver performance</strong>: Fast resolvers have higher relative overhead</li><li><strong>Filtering effectiveness</strong>: Better targeting = less overhead</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="best-practices">Best Practices<a href="#best-practices" class="hash-link" aria-label="Direct link to Best Practices" title="Direct link to Best Practices"></a></h4><ol><li><p><strong>Start Conservative</strong>: Begin with field-level metrics disabled</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p><strong>Target Known Issues</strong>: Enable selectively for problematic operations</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"slowSearchQuery,complexLineageQuery"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p><strong>Use Path Patterns Wisely</strong>: Focus on expensive resolver paths</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelPaths</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"/search/**,/**/lineage/**"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p><strong>Avoid Path Tags in Production</strong>: High cardinality risk</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelPathEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Keep this false</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p><strong>Monitor Instrumentation Overhead</strong>: Track the <code>graphql.fields.instrumented</code> metric</p></li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="example-configurations">Example Configurations<a href="#example-configurations" class="hash-link" aria-label="Direct link to Example Configurations" title="Direct link to Example Configurations"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="development-environment-full-visibility">Development Environment (Full Visibility)<a href="#development-environment-full-visibility" class="hash-link" aria-label="Direct link to Development Environment (Full Visibility)" title="Direct link to Development Environment (Full Visibility)"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">graphQL</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">metrics</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">""</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># All operations</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelPathEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Include paths for debugging</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">trivialDataFetchersEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="production---targeted-monitoring">Production - Targeted Monitoring<a href="#production---targeted-monitoring" class="hash-link" aria-label="Direct link to Production - Targeted Monitoring" title="Direct link to Production - Targeted Monitoring"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">graphQL</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">metrics</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"getSearchResultsForMultiple,searchAcrossLineage"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelPaths</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"/search/results/*,/lineage/upstream/**,/lineage/downstream/**"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelPathEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">trivialDataFetchersEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="production---minimal-overhead">Production - Minimal Overhead<a href="#production---minimal-overhead" class="hash-link" aria-label="Direct link to Production - Minimal Overhead" title="Direct link to Production - Minimal Overhead"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">graphQL</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">metrics</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">fieldLevelEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Only request-level metrics</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="debugging-slow-queries">Debugging Slow Queries<a href="#debugging-slow-queries" class="hash-link" aria-label="Direct link to Debugging Slow Queries" title="Direct link to Debugging Slow Queries"></a></h3><p>When investigating GraphQL performance issues:</p><ol><li><strong>Enable request-level metrics first</strong> to identify slow operations</li><li><strong>Temporarily enable field-level metrics</strong> for the slow operation:<div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelOperations</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"problematicQuery"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><strong>Analyze field duration metrics</strong> to find bottlenecks</li><li><strong>Optionally enable path tags</strong> (briefly) for precise identification:<div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">fieldLevelPathEnabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Temporary only!</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><strong>Optimize identified resolvers</strong> and disable detailed instrumentation</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="integration-with-monitoring-stack">Integration with Monitoring Stack<a href="#integration-with-monitoring-stack" class="hash-link" aria-label="Direct link to Integration with Monitoring Stack" title="Direct link to Integration with Monitoring Stack"></a></h3><p>The GraphQL metrics integrate seamlessly with DataHub's monitoring infrastructure:</p><ul><li><strong>Prometheus</strong>: Metrics exposed at <code>/actuator/prometheus</code></li><li><strong>Grafana</strong>: Create dashboards showing:<ul><li>Request rates and latencies by operation</li><li>Error rates and types</li><li>Field resolver performance heatmaps</li><li>Top slow operations and fields</li></ul></li></ul><p>Example Prometheus queries:</p><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Average request duration by operation</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(graphql_request_duration_seconds_sum[5m])</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/ rate(graphql_request_duration_seconds_count[5m])</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Field resolver p99 latency</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">histogram_quantile(0.99,</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> rate(graphql_field_duration_seconds_bucket[5m])</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Error rate by operation</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(graphql_request_errors_total[5m])</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="cache-monitoring-micrometer">Cache Monitoring (Micrometer)<a href="#cache-monitoring-micrometer" class="hash-link" aria-label="Direct link to Cache Monitoring (Micrometer)" title="Direct link to Cache Monitoring (Micrometer)"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="overview-2">Overview<a href="#overview-2" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h3><p>Micrometer provides automatic instrumentation for cache implementations, offering deep insights into cache performance
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and efficiency. This instrumentation is crucial for DataHub, where caching significantly impacts query performance and system load.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="automatic-cache-metrics">Automatic Cache Metrics<a href="#automatic-cache-metrics" class="hash-link" aria-label="Direct link to Automatic Cache Metrics" title="Direct link to Automatic Cache Metrics"></a></h3><p>When caches are registered with Micrometer, comprehensive metrics are automatically collected without code changes:</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="core-metrics">Core Metrics<a href="#core-metrics" class="hash-link" aria-label="Direct link to Core Metrics" title="Direct link to Core Metrics"></a></h4><ul><li><strong><code>cache.size</code></strong> (Gauge) - Current number of entries in the cache</li><li><strong><code>cache.gets</code></strong> (Counter) - Cache access attempts, tagged with:<ul><li><code>result=hit</code> - Successful cache hits</li><li><code>result=miss</code> - Cache misses requiring backend fetch</li></ul></li><li><strong><code>cache.puts</code></strong> (Counter) - Number of entries added to cache</li><li><strong><code>cache.evictions</code></strong> (Counter) - Number of entries evicted</li><li><strong><code>cache.eviction.weight</code></strong> (Counter) - Total weight of evicted entries (for size-based eviction)</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="derived-metrics">Derived Metrics<a href="#derived-metrics" class="hash-link" aria-label="Direct link to Derived Metrics" title="Direct link to Derived Metrics"></a></h4><p>Calculate key performance indicators using Prometheus queries:</p><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Cache hit rate (should be >80% for hot caches)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">sum(rate(cache_gets_total{result="hit"}[5m])) by (cache) /</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">sum(rate(cache_gets_total[5m])) by (cache)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Cache miss rate</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">1 - (cache_hit_rate)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Eviction rate (indicates cache pressure)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(cache_evictions_total[5m])</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-cache-configuration">DataHub Cache Configuration<a href="#datahub-cache-configuration" class="hash-link" aria-label="Direct link to DataHub Cache Configuration" title="Direct link to DataHub Cache Configuration"></a></h3><p>DataHub uses multiple cache layers, each automatically instrumented:</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="1-entity-client-cache">1. Entity Client Cache<a href="#1-entity-client-cache" class="hash-link" aria-label="Direct link to 1. Entity Client Cache" title="Direct link to 1. Entity Client Cache"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">cache.client.entityClient</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">maxBytes</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">104857600</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 100MB</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">entityAspectTTLSeconds</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">corpuser</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">corpUserInfo</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">20</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Short TTL for frequently changing data</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">corpUserKey</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">300</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Longer TTL for stable data</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">structuredProperty</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">propertyDefinition</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">300</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">structuredPropertyKey</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">86400</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 1 day for very stable data</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="2-usage-statistics-cache">2. Usage Statistics Cache<a href="#2-usage-statistics-cache" class="hash-link" aria-label="Direct link to 2. Usage Statistics Cache" title="Direct link to 2. Usage Statistics Cache"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">cache.client.usageClient</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">maxBytes</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">52428800</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 50MB</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">defaultTTLSeconds</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">86400</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 1 day</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Caches expensive usage calculations</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="3-search--lineage-cache">3. Search & Lineage Cache<a href="#3-search--lineage-cache" class="hash-link" aria-label="Direct link to 3. Search & Lineage Cache" title="Direct link to 3. Search & Lineage Cache"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">cache.search.lineage</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">ttlSeconds</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">86400</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 1 day</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="monitoring-best-practices">Monitoring Best Practices<a href="#monitoring-best-practices" class="hash-link" aria-label="Direct link to Monitoring Best Practices" title="Direct link to Monitoring Best Practices"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="key-indicators-to-watch">Key Indicators to Watch<a href="#key-indicators-to-watch" class="hash-link" aria-label="Direct link to Key Indicators to Watch" title="Direct link to Key Indicators to Watch"></a></h4><ol><li><p><strong>Hit Rate by Cache Type</strong></p><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Alert if hit rate drops below 70%</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">cache_hit_rate < 0.7</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p><strong>Memory Pressure</strong></p><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># High eviction rate relative to puts</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(cache_evictions_total[5m]) / rate(cache_puts_total[5m]) > 0.1</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="thread-pool-executor-monitoring-micrometer">Thread Pool Executor Monitoring (Micrometer)<a href="#thread-pool-executor-monitoring-micrometer" class="hash-link" aria-label="Direct link to Thread Pool Executor Monitoring (Micrometer)" title="Direct link to Thread Pool Executor Monitoring (Micrometer)"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="overview-3">Overview<a href="#overview-3" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h3><p>Micrometer automatically instruments Java <code>ThreadPoolExecutor</code> instances, providing crucial visibility into concurrency
|
||
bottlenecks and resource utilization. For DataHub's concurrent operations, this monitoring is essential for maintaining
|
||
performance under load.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="automatic-executor-metrics">Automatic Executor Metrics<a href="#automatic-executor-metrics" class="hash-link" aria-label="Direct link to Automatic Executor Metrics" title="Direct link to Automatic Executor Metrics"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="pool-state-metrics">Pool State Metrics<a href="#pool-state-metrics" class="hash-link" aria-label="Direct link to Pool State Metrics" title="Direct link to Pool State Metrics"></a></h4><ul><li><strong><code>executor.pool.size</code></strong> (Gauge) - Current number of threads in pool</li><li><strong><code>executor.pool.core</code></strong> (Gauge) - Core (minimum) pool size</li><li><strong><code>executor.pool.max</code></strong> (Gauge) - Maximum allowed pool size</li><li><strong><code>executor.active</code></strong> (Gauge) - Threads actively executing tasks</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="queue-metrics">Queue Metrics<a href="#queue-metrics" class="hash-link" aria-label="Direct link to Queue Metrics" title="Direct link to Queue Metrics"></a></h4><ul><li><strong><code>executor.queued</code></strong> (Gauge) - Tasks waiting in queue</li><li><strong><code>executor.queue.remaining</code></strong> (Gauge) - Available queue capacity</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="performance-metrics">Performance Metrics<a href="#performance-metrics" class="hash-link" aria-label="Direct link to Performance Metrics" title="Direct link to Performance Metrics"></a></h4><ul><li><strong><code>executor.completed</code></strong> (Counter) - Total completed tasks</li><li><strong><code>executor.seconds</code></strong> (Timer) - Task execution time distribution</li><li><strong><code>executor.rejected</code></strong> (Counter) - Tasks rejected due to saturation</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-executor-configurations">DataHub Executor Configurations<a href="#datahub-executor-configurations" class="hash-link" aria-label="Direct link to DataHub Executor Configurations" title="Direct link to DataHub Executor Configurations"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="1-graphql-query-executor">1. GraphQL Query Executor<a href="#1-graphql-query-executor" class="hash-link" aria-label="Direct link to 1. GraphQL Query Executor" title="Direct link to 1. GraphQL Query Executor"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">graphQL.concurrency</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">separateThreadPool</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">corePoolSize</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">20</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Base threads</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">maxPoolSize</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">200</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Scale under load</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">keepAlive</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">60</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Seconds before idle thread removal</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Handles complex GraphQL query resolution</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="2-batch-processing-executors">2. Batch Processing Executors<a href="#2-batch-processing-executors" class="hash-link" aria-label="Direct link to 2. Batch Processing Executors" title="Direct link to 2. Batch Processing Executors"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">entityClient.restli</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">get</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">batchConcurrency</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">2</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Parallel batch processors</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">batchQueueSize</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">500</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Task buffer</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">batchThreadKeepAlive</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">60</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">ingest</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">batchConcurrency</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">2</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">batchQueueSize</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">500</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="3-search--analytics-executors">3. Search & Analytics Executors<a href="#3-search--analytics-executors" class="hash-link" aria-label="Direct link to 3. Search & Analytics Executors" title="Direct link to 3. Search & Analytics Executors"></a></h4><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">timeseriesAspectService.query</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">concurrency</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">10</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Parallel query threads</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">queueSize</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">500</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Buffered queries</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="critical-monitoring-patterns">Critical Monitoring Patterns<a href="#critical-monitoring-patterns" class="hash-link" aria-label="Direct link to Critical Monitoring Patterns" title="Direct link to Critical Monitoring Patterns"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="saturation-detection">Saturation Detection<a href="#saturation-detection" class="hash-link" aria-label="Direct link to Saturation Detection" title="Direct link to Saturation Detection"></a></h4><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Thread pool utilization (>0.8 indicates pressure)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">executor_active / executor_pool_size > 0.8</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Queue filling up (>0.7 indicates backpressure)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">executor_queued / (executor_queued + executor_queue_remaining) > 0.7</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="rejection--starvation">Rejection & Starvation<a href="#rejection--starvation" class="hash-link" aria-label="Direct link to Rejection & Starvation" title="Direct link to Rejection & Starvation"></a></h4><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Task rejections (should be zero)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(executor_rejected_total[1m]) > 0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Thread starvation (all threads busy for extended period)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">avg_over_time(executor_active[5m]) >= executor_pool_core</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="performance-analysis">Performance Analysis<a href="#performance-analysis" class="hash-link" aria-label="Direct link to Performance Analysis" title="Direct link to Performance Analysis"></a></h4><div class="language-promql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-promql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Average task execution time</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(executor_seconds_sum[5m]) / rate(executor_seconds_count[5m])</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># Task throughput by executor</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">rate(executor_completed_total[5m])</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="tuning-guidelines">Tuning Guidelines<a href="#tuning-guidelines" class="hash-link" aria-label="Direct link to Tuning Guidelines" title="Direct link to Tuning Guidelines"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="symptoms--solutions">Symptoms & Solutions<a href="#symptoms--solutions" class="hash-link" aria-label="Direct link to Symptoms & Solutions" title="Direct link to Symptoms & Solutions"></a></h4><table><thead><tr><th>Symptom</th><th>Metric Pattern</th><th>Solution</th></tr></thead><tbody><tr><td>High latency</td><td><code>executor_queued</code> rising</td><td>Increase pool size</td></tr><tr><td>Rejections</td><td><code>executor_rejected</code> > 0</td><td>Increase queue size or pool max</td></tr><tr><td>Memory pressure</td><td>Many idle threads</td><td>Reduce <code>keepAlive</code> time</td></tr><tr><td>CPU waste</td><td>Low <code>executor_active</code></td><td>Reduce core pool size</td></tr></tbody></table><h4 class="anchor anchorWithStickyNavbar_LWe7" id="capacity-planning">Capacity Planning<a href="#capacity-planning" class="hash-link" aria-label="Direct link to Capacity Planning" title="Direct link to Capacity Planning"></a></h4><ol><li><strong>Measure baseline</strong>: Monitor under normal load</li><li><strong>Stress test</strong>: Identify saturation points</li><li><strong>Set alerts</strong>:<ul><li>Warning at 70% utilization</li><li>Critical at 90% utilization</li></ul></li><li><strong>Auto-scale</strong>: Consider dynamic pool sizing based on queue depth</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="distributed-tracing">Distributed Tracing<a href="#distributed-tracing" class="hash-link" aria-label="Direct link to Distributed Tracing" title="Direct link to Distributed Tracing"></a></h2><p>Traces let us track the life of a request across multiple components. Each trace is consisted of multiple spans, which
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are units of work, containing various context about the work being done as well as time taken to finish the work. By
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||
looking at the trace, we can more easily identify performance bottlenecks.</p><p>We enable tracing by using the <a href="https://github.com/open-telemetry/opentelemetry-java-instrumentation" target="_blank" rel="noopener noreferrer">OpenTelemetry java instrumentation library</a>.
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||
This project provides a Java agent JAR that is attached to java applications. The agent injects bytecode to capture
|
||
telemetry from popular libraries.</p><p>Using the agent we are able to</p><ol><li>Plug and play different tracing tools based on the user's setup: Jaeger, Zipkin, or other tools</li><li>Get traces for Kafka, JDBC, and Elasticsearch without any additional code</li><li>Track traces of any function with a simple <code>@WithSpan</code> annotation</li></ol><p>You can enable the agent by setting env variable <code>ENABLE_OTEL</code> to <code>true</code> for GMS and MAE/MCE consumers. In our
|
||
example <a href="https://github.com/datahub-project/datahub/blob/master/docker/monitoring/docker-compose.monitoring.yml" target="_blank" rel="noopener noreferrer">docker-compose</a>, we export metrics to a local Jaeger
|
||
instance by setting env variable <code>OTEL_TRACES_EXPORTER</code> to <code>jaeger</code>
|
||
and <code>OTEL_EXPORTER_JAEGER_ENDPOINT</code> to <code>http://jaeger-all-in-one:14250</code>, but you can easily change this behavior by
|
||
setting the correct env variables. Refer to
|
||
this <a href="https://github.com/open-telemetry/opentelemetry-java/blob/main/sdk-extensions/autoconfigure/README.md" target="_blank" rel="noopener noreferrer">doc</a> for
|
||
all configs.</p><p>Once the above is set up, you should be able to see a detailed trace as a request is sent to GMS. We added
|
||
the <code>@WithSpan</code> annotation in various places to make the trace more readable. You should start to see traces in the
|
||
tracing collector of choice. Our example <a href="https://github.com/datahub-project/datahub/blob/master/docker/monitoring/docker-compose.monitoring.yml" target="_blank" rel="noopener noreferrer">docker-compose</a> deploys
|
||
an instance of Jaeger with port 16686. The traces should be available at http://localhost:16686.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="configuration-note">Configuration Note<a href="#configuration-note" class="hash-link" aria-label="Direct link to Configuration Note" title="Direct link to Configuration Note"></a></h3><p>We recommend using either <code>grpc</code> or <code>http/protobuf</code>, configured using <code>OTEL_EXPORTER_OTLP_PROTOCOL</code>. Avoid using <code>http</code> will not work as expected due to the size of
|
||
the generated spans.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="micrometer">Micrometer<a href="#micrometer" class="hash-link" aria-label="Direct link to Micrometer" title="Direct link to Micrometer"></a></h2><p>DataHub is transitioning to Micrometer as its primary metrics framework, representing a significant upgrade in observability
|
||
capabilities. Micrometer is a vendor-neutral application metrics facade that provides a simple, consistent API for the most
|
||
popular monitoring systems, allowing you to instrument your JVM-based application code without vendor lock-in.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="why-micrometer">Why Micrometer?<a href="#why-micrometer" class="hash-link" aria-label="Direct link to Why Micrometer?" title="Direct link to Why Micrometer?"></a></h3><ol><li><p>Native Spring Integration</p><p>As DataHub uses Spring Boot, Micrometer provides seamless integration with:</p><ul><li>Auto-configuration of common metrics</li><li>Built-in metrics for HTTP requests, JVM, caches, and more</li><li>Spring Boot Actuator endpoints for metrics exposure</li><li>Automatic instrumentation of Spring components</li></ul></li><li><p>Multi-Backend Support</p><p>Unlike the legacy DropWizard approach that primarily targets JMX, Micrometer natively supports:</p><ul><li>Prometheus (recommended for cloud-native deployments)</li><li>JMX (for backward compatibility)</li><li>StatsD</li><li>CloudWatch</li><li>Datadog</li><li>New Relic</li><li>And many more...</li></ul></li><li><p>Dimensional Metrics</p><p>Micrometer embraces modern dimensional metrics with <strong>labels/tags</strong>, enabling:</p><ul><li>Rich querying and aggregation capabilities</li><li>Better cardinality control</li><li>More flexible dashboards and alerts</li><li>Natural integration with cloud-native monitoring systems</li></ul></li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="micrometer-transition-plan">Micrometer Transition Plan<a href="#micrometer-transition-plan" class="hash-link" aria-label="Direct link to Micrometer Transition Plan" title="Direct link to Micrometer Transition Plan"></a></h2><p>DataHub is undertaking a strategic transition from DropWizard metrics (exposed via JMX) to Micrometer, a modern vendor-neutral metrics facade.
|
||
This transition aims to provide better cloud-native monitoring capabilities while maintaining backward compatibility for existing
|
||
monitoring infrastructure.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="current-state">Current State<a href="#current-state" class="hash-link" aria-label="Direct link to Current State" title="Direct link to Current State"></a></h3><p>What We Have Now:</p><ul><li>Primary System: DropWizard metrics exposed through JMX</li><li>Collection Method: Prometheus-JMX exporter scrapes JMX metrics</li><li>Dashboards: Grafana dashboards consuming JMX-sourced metrics</li><li>Code Pattern: MetricUtils class for creating counters and timers</li><li>Integration: Basic Spring integration with manual metric creation</li></ul><p align="center"><img loading="lazy" width="80%" src="https://raw.githubusercontent.com/datahub-project/static-assets/0f6ae5ae889ee4e780504ca566670867acf975ff/imgs/advanced/monitoring/monitoring_current.svg" class="img_ev3q"></p><p>Limitations:</p><ul><li>JMX-centric approach limits monitoring backend options</li><li>No unified observability (separate instrumentation for metrics and traces)</li><li>No support for dimensional metrics and tags</li><li>Manual instrumentation required for most components</li><li>Legacy naming conventions without proper tagging</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="transition-state">Transition State<a href="#transition-state" class="hash-link" aria-label="Direct link to Transition State" title="Direct link to Transition State"></a></h3><p>What We're Building:</p><ul><li>Primary System: Micrometer with native Prometheus support</li><li>Collection Method: Direct Prometheus scraping via /actuator/prometheus</li><li>Unified Telemetry: Single instrumentation point for both metrics and traces</li><li>Modern Patterns: Dimensional metrics with rich tagging</li><li>Multi-Backend: Support for Prometheus, StatsD, CloudWatch, Datadog, etc.</li><li>Auto-Instrumentation: Automatic metrics for Spring components</li></ul><p align="center"><img loading="lazy" width="80%" src="https://raw.githubusercontent.com/datahub-project/static-assets/0f6ae5ae889ee4e780504ca566670867acf975ff/imgs/advanced/monitoring/monitoring_transition.svg" class="img_ev3q"></p><p>Key Decisions and Rationale:</p><ol><li><p>Dual Registry Approach</p><p><strong>Decision:</strong> Run both systems in parallel with tag-based routing</p><p><strong>Rationale:</strong></p><ul><li>Zero downtime or disruption</li><li>Gradual migration at component level</li><li>Easy rollback if issues arise</li></ul></li><li><p>Prometheus as Primary Target</p><p><strong>Decision:</strong> Focus on Prometheus for new metrics</p><p><strong>Rationale:</strong></p><ul><li>Industry standard for cloud-native applications</li><li>Rich query language and ecosystem</li><li>Better suited for dimensional metrics</li></ul></li><li><p>Observation API Adoption</p><p><strong>Decision:</strong> Promote Observation API for new instrumentation</p><p><strong>Rationale:</strong></p><ul><li>Single instrumentation for metrics + traces</li><li>Reduced code complexity</li><li>Consistent naming across telemetry types</li></ul></li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="future-state">Future State<a href="#future-state" class="hash-link" aria-label="Direct link to Future State" title="Direct link to Future State"></a></h3><p align="center"><img loading="lazy" width="80%" src="https://raw.githubusercontent.com/datahub-project/static-assets/0f6ae5ae889ee4e780504ca566670867acf975ff/imgs/advanced/monitoring/monitoring_future.svg" class="img_ev3q"></p><p>Once fully adopted, Micrometer will transform DataHub's observability from a collection of separate tools into a unified platform.
|
||
This means developers can focus on building features while getting comprehensive telemetry "for free."</p><p>Intelligent and Adaptive Monitoring</p><ul><li>Dynamic Instrumentation: Enable detailed metrics for specific entities or operations on-demand without code changes</li><li>Environment-Aware Metrics: Automatically route metrics to Prometheus in Kubernetes, CloudWatch in AWS, or Azure Monitor in Azure</li><li>Built-in SLO Tracking: Define Service Level Objectives declaratively and automatically track error budgets</li></ul><p>Developer and Operator Experience</p><ul><li>Adding @Observed to a method automatically generates latency percentiles, error rates, and distributed trace spans</li><li>Every service exposes golden signals (latency, traffic, errors, saturation) out-of-the-box</li><li>Business metrics (entity ingestion rates, search performance) seamlessly correlate with system metrics</li><li>Self-documenting telemetry where metrics, traces, and logs tell a coherent operational story</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="dropwizard--jmx">DropWizard & JMX<a href="#dropwizard--jmx" class="hash-link" aria-label="Direct link to DropWizard & JMX" title="Direct link to DropWizard & JMX"></a></h2><p>We originally decided to use <a href="https://metrics.dropwizard.io/4.2.0/" target="_blank" rel="noopener noreferrer">Dropwizard Metrics</a> to export custom metrics to JMX,
|
||
and then use <a href="https://github.com/prometheus/jmx_exporter" target="_blank" rel="noopener noreferrer">Prometheus-JMX exporter</a> to export all JMX metrics to
|
||
Prometheus. This allows our code base to be independent of the metrics collection tool, making it easy for people to use
|
||
their tool of choice. You can enable the agent by setting env variable <code>ENABLE_PROMETHEUS</code> to <code>true</code> for GMS and MAE/MCE
|
||
consumers. Refer to this example <a href="https://github.com/datahub-project/datahub/blob/master/docker/monitoring/docker-compose.monitoring.yml" target="_blank" rel="noopener noreferrer">docker-compose</a> for setting the
|
||
variables.</p><p>In our example <a href="https://github.com/datahub-project/datahub/blob/master/docker/monitoring/docker-compose.monitoring.yml" target="_blank" rel="noopener noreferrer">docker-compose</a>, we have configured prometheus to
|
||
scrape from 4318 ports of each container used by the JMX exporter to export metrics. We also configured grafana to
|
||
listen to prometheus and create useful dashboards. By default, we provide two
|
||
dashboards: <a href="https://grafana.com/grafana/dashboards/14845" target="_blank" rel="noopener noreferrer">JVM dashboard</a> and DataHub dashboard.</p><p>In the JVM dashboard, you can find detailed charts based on JVM metrics like CPU/memory/disk usage. In the DataHub
|
||
dashboard, you can find charts to monitor each endpoint and the kafka topics. Using the example implementation, go
|
||
to http://localhost:3001 to find the grafana dashboards! (Username: admin, PW: admin)</p><p>To make it easy to track various metrics within the code base, we created MetricUtils class. This util class creates a
|
||
central metric registry, sets up the JMX reporter, and provides convenient functions for setting up counters and timers.
|
||
You can run the following to create a counter and increment.</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">metricUtils</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">counter</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token keyword" style="font-style:italic">this</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">getClass</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token string" style="color:rgb(195, 232, 141)">"metricName"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">increment</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>You can run the following to time a block of code.</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">try</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token class-name" style="color:rgb(255, 203, 107)">Timer</span><span class="token class-name punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token class-name" style="color:rgb(255, 203, 107)">Context</span><span class="token plain"> ignored</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">metricUtils</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">timer</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token keyword" style="font-style:italic">this</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">getClass</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token string" style="color:rgb(195, 232, 141)">"timerName"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">timer</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token plain">block of code</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="enable-monitoring-through-docker-compose">Enable monitoring through docker-compose<a href="#enable-monitoring-through-docker-compose" class="hash-link" aria-label="Direct link to Enable monitoring through docker-compose" title="Direct link to Enable monitoring through docker-compose"></a></h4><p>We provide some example configuration for enabling monitoring in
|
||
this <a href="https://github.com/datahub-project/datahub/tree/master/docker/monitoring" target="_blank" rel="noopener noreferrer">directory</a>. Take a look at the docker-compose
|
||
files, which adds necessary env variables to existing containers, and spawns new containers (Jaeger, Prometheus,
|
||
Grafana).</p><p>You can add in the above docker-compose using the <code>-f <<path-to-compose-file>></code> when running docker-compose commands.
|
||
For instance,</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token function" style="color:rgb(130, 170, 255)">docker-compose</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -f quickstart/docker-compose.quickstart.yml </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -f monitoring/docker-compose.monitoring.yml </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> pull </span><span class="token operator" style="color:rgb(137, 221, 255)">&&</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">docker-compose</span><span class="token plain"> -p datahub </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -f quickstart/docker-compose.quickstart.yml </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -f monitoring/docker-compose.monitoring.yml </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> up</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>We set up quickstart.sh, dev.sh, and dev-without-neo4j.sh to add the above docker-compose when MONITORING=true. For
|
||
instance <code>MONITORING=true ./docker/quickstart.sh</code> will add the correct env variables to start collecting traces and
|
||
metrics, and also deploy Jaeger, Prometheus, and Grafana. We will soon support this as a flag during quickstart.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="health-check-endpoint">Health check endpoint<a href="#health-check-endpoint" class="hash-link" aria-label="Direct link to Health check endpoint" title="Direct link to Health check endpoint"></a></h2><p>For monitoring healthiness of your DataHub service, <code>/admin</code> endpoint can be used.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? Join the conversation in <a href="https://datahub.com/slack?utm_source=docs&utm_medium=footer&utm_campaign=docs_footer&utm_content=docs/advanced/monitoring">Slack!</a></div></div><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/datahub-project/datahub/blob/master/docs/advanced/monitoring.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_VsjB"></div></div></footer><div class="feedbackWrapper_mUHF"><div class="feedbackWidget_PX4d"><div class="feedbackButtons_wn3V"><strong>Is this page helpful?</strong><div><button class="feedbackButton_UgQs"><span role="img" aria-label="like" class="anticon 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19a56.76 56.76 0 0119.6 43c0 9.7-2.3 18.9-6.9 27.3l-14 25.5 21.9 19a56.76 56.76 0 0119.6 43c0 19.1-11 37.5-28.8 48.4z"></path></svg></span></button></div></div></div></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/advanced/db-retention"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Configuring Database Retention</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/deploy/telemetry"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Telemetry</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#overview" class="table-of-contents__link toc-highlight">Overview</a></li><li><a href="#why-monitor-datahub" class="table-of-contents__link toc-highlight">Why Monitor DataHub?</a></li><li><a href="#observability-components" class="table-of-contents__link toc-highlight">Observability Components</a></li><li><a href="#graphql-instrumentation-micrometer" class="table-of-contents__link toc-highlight">GraphQL Instrumentation (Micrometer)</a><ul><li><a href="#overview-1" class="table-of-contents__link toc-highlight">Overview</a></li><li><a href="#why-path-level-graphql-instrumentation-matters" class="table-of-contents__link toc-highlight">Why Path-Level GraphQL Instrumentation Matters</a></li><li><a href="#real-world-example" class="table-of-contents__link toc-highlight">Real-World Example</a></li><li><a href="#what-path-level-instrumentation-reveals" class="table-of-contents__link toc-highlight">What Path-Level Instrumentation Reveals</a></li><li><a href="#key-benefits" class="table-of-contents__link toc-highlight">Key Benefits</a></li><li><a href="#configuration-strategy" class="table-of-contents__link toc-highlight">Configuration Strategy</a></li><li><a href="#architecture" class="table-of-contents__link toc-highlight">Architecture</a></li><li><a href="#metrics-collected" class="table-of-contents__link toc-highlight">Metrics Collected</a></li><li><a href="#configuration-guide" class="table-of-contents__link toc-highlight">Configuration Guide</a></li><li><a href="#filtering-modes-explained" class="table-of-contents__link toc-highlight">Filtering Modes Explained</a></li><li><a href="#performance-considerations" class="table-of-contents__link toc-highlight">Performance Considerations</a></li><li><a href="#example-configurations" class="table-of-contents__link toc-highlight">Example Configurations</a></li><li><a href="#debugging-slow-queries" class="table-of-contents__link toc-highlight">Debugging Slow Queries</a></li><li><a href="#integration-with-monitoring-stack" class="table-of-contents__link toc-highlight">Integration with Monitoring Stack</a></li></ul></li><li><a href="#cache-monitoring-micrometer" class="table-of-contents__link toc-highlight">Cache Monitoring (Micrometer)</a><ul><li><a href="#overview-2" class="table-of-contents__link toc-highlight">Overview</a></li><li><a href="#automatic-cache-metrics" class="table-of-contents__link toc-highlight">Automatic Cache Metrics</a></li><li><a href="#datahub-cache-configuration" class="table-of-contents__link toc-highlight">DataHub Cache Configuration</a></li><li><a href="#monitoring-best-practices" class="table-of-contents__link toc-highlight">Monitoring Best Practices</a></li></ul></li><li><a href="#thread-pool-executor-monitoring-micrometer" class="table-of-contents__link toc-highlight">Thread Pool Executor Monitoring (Micrometer)</a><ul><li><a href="#overview-3" class="table-of-contents__link toc-highlight">Overview</a></li><li><a href="#automatic-executor-metrics" class="table-of-contents__link toc-highlight">Automatic Executor Metrics</a></li><li><a href="#datahub-executor-configurations" class="table-of-contents__link toc-highlight">DataHub Executor Configurations</a></li><li><a href="#critical-monitoring-patterns" class="table-of-contents__link toc-highlight">Critical Monitoring Patterns</a></li><li><a href="#tuning-guidelines" class="table-of-contents__link toc-highlight">Tuning Guidelines</a></li></ul></li><li><a href="#distributed-tracing" class="table-of-contents__link toc-highlight">Distributed Tracing</a><ul><li><a href="#configuration-note" class="table-of-contents__link toc-highlight">Configuration Note</a></li></ul></li><li><a href="#micrometer" class="table-of-contents__link toc-highlight">Micrometer</a><ul><li><a href="#why-micrometer" class="table-of-contents__link toc-highlight">Why Micrometer?</a></li></ul></li><li><a href="#micrometer-transition-plan" class="table-of-contents__link toc-highlight">Micrometer Transition Plan</a><ul><li><a href="#current-state" class="table-of-contents__link toc-highlight">Current State</a></li><li><a href="#transition-state" class="table-of-contents__link toc-highlight">Transition State</a></li><li><a href="#future-state" class="table-of-contents__link toc-highlight">Future State</a></li></ul></li><li><a href="#dropwizard--jmx" class="table-of-contents__link toc-highlight">DropWizard & JMX</a></li><li><a href="#health-check-endpoint" class="table-of-contents__link toc-highlight">Health check endpoint</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Docs</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/docs/">Introduction</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/quickstart">Quickstart</a></li></ul></div><div class="col footer__col"><div class="footer__title">Community</div><ul class="footer__items clean-list"><li 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