RUNAWAY_WATCHES

RUNAWAY_WATCHES 表展示资源消耗超出预期的查询 Runaway Queries 监控列表，见 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)

示例

查询 Runaway Queries 识别名单：

SELECT * FROM INFORMATION_SCHEMA.RUNAWAY_WATCHES\G;

输出结果如下：

*************************** 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)

添加一个识别项到资源组 rg1：

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

再次查询 Runaway Queries 识别名单：

SELECT * FROM INFORMATION_SCHEMA.RUNAWAY_WATCHES\G;

输出结果如下：

*************************** 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)

RUNAWAY_WATCHES 表中列的含义如下：

• ID：识别项 ID。
• RESOURCE_GROUP_NAME：资源组名称。
• START_TIME：开始时间。
• END_TIME：结束时间。UNLIMITED 表示识别项的有效时间无限长。
• WATCH：识别匹配类型，其值如下：
  • Plan 表示按照 Plan Digest 匹配，此时列 WATCH_TEXT 显示 Plan Digest。
  • Similar 表示按照 SQL Digest 匹配，此时列 WATCH_TEXT 显示 SQL Digest。
  • Exact 表示按照 SQL 文本匹配，此时列 WATCH_TEXT 显示 SQL 文本。
• SOURCE：识别项来源，如果是被 QUERY_LIMIT 规则识别，则显示识别到的 TiDB IP；如果是手动添加，则显示 manual。
• ACTION：识别后的对应操作。