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resouce control: add desp about QUERY WATCH REMOVE RESOURCE GROUP #21277

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resouce control: add desp about QUERY WATCH REMOVE RESOURCE GROUP #21277

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10 changes: 9 additions & 1 deletion tidb-resource-control-runaway-queries.md
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Expand Up @@ -37,7 +37,9 @@ There are three methods for `WATCH` to match for quick identification:

The `DURATION` option in `WATCH` indicates the duration of the identification item, which is infinite by default.

After a watch item is added, neither the matching feature nor the `ACTION` is changed or deleted whenever the `QUERY_LIMIT` configuration is changed or deleted. You can use `QUERY WATCH REMOVE` to remove a watch item.
After a watch item is added, neither the matching feature nor the `ACTION` is changed or deleted whenever the `QUERY_LIMIT` configuration is changed or deleted.

You can use `QUERY WATCH REMOVE` to remove a watch item, or use `QUERY WATCH REMOVE RESOURCE GROUP` to remove all watch items of a specific resource group in a batch.

The parameters of `QUERY_LIMIT` are as follows:

Expand Down Expand Up @@ -134,6 +136,12 @@ The parameters are as follows:
QUERY WATCH REMOVE 1;
```

- Remove all watch items of a specific resource group:

```sql
QUERY WATCH REMOVE RESOURCE GROUP rg1;
```

## Observability

You can get more information about runaway queries from the following system tables and `INFORMATION_SCHEMA`:
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