You can refer to the following guide to get more details about the backup and restore:
{% inlineCalloutContainer %}
{% inlineCallout
color="violet-70"
icon="luggage"
bold="Backup Metadata"
href="/deployment/backup-restore-metadata" %}
Learn how to back up MySQL or Postgres data.
{% /inlineCallout %}
{% /inlineCalloutContainer %}
### Update `sort_buffer_size` (MySQL) or `work_mem` (Postgres)
Before running the migrations, it is important to update these parameters to ensure there are no runtime errors.
A safe value would be setting them to 20MB.
**If using MySQL**
You can update it via SQL (note that it will reset after the server restarts):
```sql
SET GLOBAL sort_buffer_size = 20971520
```
To make the configuration persistent, you'd need to navigate to your MySQL Server install directory and update the
`my.ini` or `my.cnf` [files](https://dev.mysql.com/doc/refman/8.0/en/option-files.html) with `sort_buffer_size = 20971520`.
If using RDS, you will need to update your instance's [Parameter Group](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithParamGroups.html)
to include the above change.
**If using Postgres**
You can update it via SQL (not that it will reset after the server restarts):
```sql
SET work_mem = '20MB';
```
To make the configuration persistent, you'll need to update the `postgresql.conf` [file](https://www.postgresql.org/docs/9.3/config-setting.html)
with `work_mem = 20MB`.
If using RDS, you will need to update your instance's [Parameter Group](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithParamGroups.html)
to include the above change.
Note that this value would depend on the size of your `query_entity` table. If you still see `Out of Sort Memory Error`s
during the migration after bumping this value, you can increase them further.
After the migration is finished, you can revert this changes.
- **Metadata Backup & Restore**: The Metadata Backup/Recovery has been deprecated, and no further support will be provided. Users are advised to use database-native tools to back up data and store it in their object store for recovery.
You can check the [docs](/deployment/backup-restore-metadata) for more information.
with the docker compose files in the release page ([docs](/quick-start/local-docker-deployment)). In this release, we're completely removing the support for `metadata docker`.
- **bootstrap_storage.sh**: We have deprecated `bootstrap/bootstrap_storage.sh` and replaced it with `bootstrap/openmetadata-ops.sh`. The documentation has been updated accordingly.
- **Activity Feed**: The Activity Feed has been improved with new, updated cards that display critical information such as data quality test case updates, descriptions, tag updates, or asset removal.
- **Lineage**: The Expand All button has been removed. A new Layers button is introduced in the bottom left corner. With the Layers button, you can add Column Level Lineage or Data Observability details to your Lineage view.
- **Glossary**: Adding Glossary Term view has been improved. Now, we show glossary terms hierarchically, enabling a better understanding of how the terms are set up while labeling a table or dashboard.
- **Classifications**: users can set it to be mutually exclusive **only** at the time of creation. Once created, you cannot change it back to mutually non-exclusive or vice versa.
This is to prevent conflicts between adding multiple tags that belong to the same classification and later turning the mutually exclusive flag back to true.
