maytasm commented on a change in pull request #12190:
URL: https://github.com/apache/druid/pull/12190#discussion_r793046552
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File path: docs/operations/clean-metadata-store.md
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@@ -117,12 +115,19 @@ Rule cleanup uses the following configuration:
### Compaction configuration records
+Druid retains all compaction configuration records by default, which should be
suitable for most use cases.
+If you have a high datasource churn rate, that is, you create and delete
short-lived datasources with high frequency, consider turning on automated
cleanup of compaction configuration records.
+With this feature turned on, when you create a compaction configuration for
some datasource before the datasource exists, for example if ingestion is
ongoing, Druid may remove the compaction configuration.
+To prevent the configuration from being prematurely removed, wait to set
`druid.coordinator.kill.compaction.on=true` until after the datasource is
created.
Review comment:
```suggestion
To prevent the configuration from being prematurely removed, wait to set
auto compaction configuration on the datasource after the datasource is created.
```
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