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RUNAWAY_WATCHES

The RUNAWAY_WATCHES table shows the watch list of runaway queries that consume more resources than expected. For more information, see Runaway Queries.

USE INFORMATION_SCHEMA; DESC RUNAWAY_WATCHES;
+---------------------+--------------+------+------+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------------------+--------------+------+------+---------+-------+ | ID | bigint(64) | NO | | NULL | | | RESOURCE_GROUP_NAME | varchar(32) | NO | | NULL | | | START_TIME | varchar(32) | NO | | NULL | | | END_TIME | varchar(32) | YES | | NULL | | | WATCH | varchar(12) | NO | | NULL | | | WATCH_TEXT | text | NO | | NULL | | | SOURCE | varchar(128) | NO | | NULL | | | ACTION | varchar(12) | NO | | NULL | | +---------------------+--------------+------+------+---------+-------+ 8 rows in set (0.00 sec)

Examples

Query the watch list of runaway queries:

SELECT * FROM INFORMATION_SCHEMA.RUNAWAY_WATCHES\G

The output is as follows:

*************************** 1. row *************************** ID: 20003 RESOURCE_GROUP_NAME: rg2 START_TIME: 2023-07-28 13:06:08 END_TIME: UNLIMITED WATCH: Similar WATCH_TEXT: 5b7fd445c5756a16f910192ad449c02348656a5e9d2aa61615e6049afbc4a82e SOURCE: 127.0.0.1:4000 ACTION: Kill *************************** 2. row *************************** ID: 16004 RESOURCE_GROUP_NAME: rg2 START_TIME: 2023-07-28 01:45:30 END_TIME: UNLIMITED WATCH: Similar WATCH_TEXT: 3d48fca401d8cbb31a9f29adc9c0f9d4be967ca80a34f59c15f73af94e000c84 SOURCE: 127.0.0.1:4000 ACTION: Kill 2 rows in set (0.00 sec)

Add a watch item into list to the resource group rg1:

QUERY WATCH ADD RESOURCE GROUP rg1 SQL TEXT EXACT TO 'select * from sbtest.sbtest1';

Query the watch list of runaway queries again:

SELECT * FROM INFORMATION_SCHEMA.RUNAWAY_WATCHES\G

The output is as follows:

*************************** 1. row *************************** ID: 20003 RESOURCE_GROUP_NAME: rg2 START_TIME: 2023-07-28 13:06:08 END_TIME: UNLIMITED WATCH: Similar WATCH_TEXT: 5b7fd445c5756a16f910192ad449c02348656a5e9d2aa61615e6049afbc4a82e SOURCE: 127.0.0.1:4000 ACTION: Kill *************************** 2. row *************************** ID: 16004 RESOURCE_GROUP_NAME: rg2 START_TIME: 2023-07-28 01:45:30 END_TIME: UNLIMITED WATCH: Similar WATCH_TEXT: 3d48fca401d8cbb31a9f29adc9c0f9d4be967ca80a34f59c15f73af94e000c84 SOURCE: 127.0.0.1:4000 ACTION: Kill *************************** 3. row *************************** ID: 20004 RESOURCE_GROUP_NAME: rg1 START_TIME: 2023-07-28 14:23:04 END_TIME: UNLIMITED WATCH: Exact WATCH_TEXT: select * from sbtest.sbtest1 SOURCE: manual ACTION: NoneAction 3 row in set (0.00 sec)

The meaning of each column field in the RUNAWAY_WATCHES table is as follows:

  • ID: the ID of the watch item.
  • RESOURCE_GROUP_NAME: the name of the resource group.
  • START_TIME: the start time.
  • END_TIME: the end time. UNLIMITED means that the watch item has an unlimited validity period.
  • WATCH: the match type of the quick identification. The values are as follows:
    • Plan indicates that the Plan Digest is matched. In this case, the WATCH_TEXT column shows the Plan Digest.
    • Similar indicates that the SQL Digest is matched. In this case, the WATCH_TEXT column shows the SQL Digest.
    • Exact indicates that the SQL text is matched. In this case, the WATCH_TEXT column shows the SQL text.
  • SOURCE: the source of the watch item. If it is identified by the QUERY_LIMIT rule, the identified TiDB IP address is displayed. If it is manually added, manual is displayed.
  • ACTION: the corresponding operation after the identification.

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