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add serverless ttl job interval desc #18420

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Jul 30, 2024
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add serverless ttl job interval desc #18420

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add serverless ttl job interval desc
ystaticy Jul 29, 2024
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add serverless ttl job interval desc
ystaticy Jul 29, 2024
ea1d3c6
add serverless ttl job interval desc
ystaticy Jul 30, 2024
a4f6171
fix desc
ystaticy Jul 30, 2024
6b2be08
add CustomContent
Oreoxmt Jul 30, 2024
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4 changes: 4 additions & 0 deletions tidb-cloud/serverless-limitations.md
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Expand Up @@ -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.
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8 changes: 8 additions & 0 deletions time-to-live.md
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Expand Up @@ -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
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