系统表介绍
events_waits_summary_by_user_by_event_name 按事件名称与用户进行汇总
| 列名 | 含义 |
|---|---|
| USER | 用户名 |
| EVENT_NAME | 事件名称 |
| COUNT_STAR | 事件汇总数量 |
| SUM_TIMER_WAIT | 事件总等待时间 |
| MIN_TIMER_WAIT | 事件最小等待时间 |
| AVG_TIMER_WAIT | 事件平均等待时间 |
| MAX_TIMER_WAIT | 事件最大等待时间 |
实例
mysql> SELECT *
-> FROM events_waits_summary_by_user_by_event_name
-> WHERE COUNT_STAR > 0
-> order by 1 desc
-> limit 10 ;
+------+--------------------------------------+------------+--------------------+----------------+-----------------+-------------------+
| USER | EVENT_NAME | COUNT_STAR | SUM_TIMER_WAIT | MIN_TIMER_WAIT | AVG_TIMER_WAIT | MAX_TIMER_WAIT |
+------+--------------------------------------+------------+--------------------+----------------+-----------------+-------------------+
| root | wait/io/file/sql/relaylog_index | 1 | 21453375 | 21453375 | 21453375 | 21453375 |
| root | wait/io/file/innodb/innodb_log_file | 4 | 2379521625 | 18693375 | 594880125 | 1711508625 |
| root | wait/io/file/sql/FRM | 291 | 37026754125 | 1281000 | 127239375 | 21677589375 |
| root | wait/io/file/sql/io_cache | 20 | 1149850125 | 2440125 | 57492375 | 214969125 |
| root | idle | 738 | 122484230136000000 | 49000000 | 165967791000000 | 44217935702000000 |
| root | wait/io/file/innodb/innodb_data_file | 13 | 731072625 | 4425750 | 56236125 | 175582875 |
| root | wait/io/file/sql/relaylog | 29 | 1584750000 | 1278750 | 54646500 | 744636375 |
| root | wait/io/file/sql/misc | 6 | 215251875 | 4672125 | 35875125 | 75279750 |
| root | wait/io/file/sql/dbopt | 30 | 18092220000 | 1591500 | 603073875 | 6355567500 |
| root | wait/io/file/sql/binlog_index | 53 | 3426805875 | 1232250 | 64656375 | 1489346625 |
+------+--------------------------------------+------------+--------------------+----------------+-----------------+-------------------+
10 rows in set (0.01 sec)