add serverless ttl job interval desc (#18420)

* add serverless ttl job interval desc Signed-off-by: [email protected] <[email protected]>
pingcap · Jul 30, 2024 · 4edeff4 · 4edeff4
1 parent e344a45
commit 4edeff4
Show file tree

Hide file tree

Showing 2 changed files with 12 additions and 0 deletions.
diff --git a/tidb-cloud/serverless-limitations.md b/tidb-cloud/serverless-limitations.md
@@ -48,6 +48,10 @@ We are constantly filling in the feature gaps between TiDB Serverless and TiDB D
 - [Changefeed](/tidb-cloud/changefeed-overview.md) is not supported for TiDB Serverless currently.
 - [Data Migration](/tidb-cloud/migrate-from-mysql-using-data-migration.md) is not supported for TiDB Serverless currently.
 
+### Time to live (TTL)
+
+- In TiDB Serverless, the [`TTL_JOB_INTERVAL`](/time-to-live.md#ttl-job) attribute for a table is fixed at `15m` and cannot be modified. This means that TiDB Serverless schedules a background job every 15 minutes to clean up expired data.
+
 ### Others
 
 - Transaction can not last longer than 30 minutes.

diff --git a/time-to-live.md b/time-to-live.md
@@ -128,6 +128,14 @@ CREATE TABLE orders (
 
 ## TTL job
 
+<CustomContent platform="tidb-cloud">
+
+> **Note:**
+>
+> In TiDB Serverless, the `TTL_JOB_INTERVAL` attribute for a table is fixed at `15m` and cannot be modified. This means that TiDB Serverless schedules a background job every 15 minutes to clean up expired data.
+
+</CustomContent>
+
 For each table with a TTL attribute, TiDB internally schedules a background job to clean up expired data. You can customize the execution period of these jobs by setting the `TTL_JOB_INTERVAL` attribute for the table. The following example sets the background cleanup jobs for the table `orders` to run once every 24 hours:
 
 ```sql