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explicitly declare the scope of runway queries #15873

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Dec 26, 2023
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explicitly declare the scope of runway queries #15873

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2 changes: 1 addition & 1 deletion tidb-resource-control.md
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Expand Up @@ -262,7 +262,7 @@ SELECT /*+ RESOURCE_GROUP(rg1) */ * FROM t limit 10;
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> This feature is experimental. It is not recommended that you use it in the production environment. This feature might be changed or removed without prior notice. If you find a bug, you can report an [issue](https://github.com/pingcap/tidb/issues) on GitHub.

A runaway query is a query that consumes more time or resources than expected. The term **runaway queries** is used in the following to describe the feature of managing the runaway query.
A runaway query is a query (`SELECT` statement only) that consumes more time or resources than expected. The term **runaway queries** is used in the following to describe the feature of managing the runaway query.

- Starting from v7.2.0, the resource control feature introduces the management of runaway queries. You can set criteria for a resource group to identify runaway queries and automatically take actions to prevent them from exhausting resources and affecting other queries. You can manage runaway queries for a resource group by including the `QUERY_LIMIT` field in [`CREATE RESOURCE GROUP`](/sql-statements/sql-statement-create-resource-group.md) or [`ALTER RESOURCE GROUP`](/sql-statements/sql-statement-alter-resource-group.md).
- Starting from v7.3.0, the resource control feature introduces manual management of runaway watches, enabling quick identification of runaway queries for a given SQL statement or Digest. You can execute the statement [`QUERY WATCH`](/sql-statements/sql-statement-query-watch.md) to manually manage the runaway queries watch list in the resource group.
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