1.修改数据字典以启用相关事件
mysql> use performance_schema
mysql> show tables like 'setup%';
+---------------------------------------+
| Tables_in_performance_schema (setup%) |
+---------------------------------------+
| setup_actors |
| setup_consumers |
| setup_instruments |
| setup_objects |
| setup_timers |
+---------------------------------------+
5 rows in set (0.00 sec)
mysql>
mysql> update performance_schema.setup_consumers set enabled='YES' where name like 'events_stages_%';
Query OK, 0 rows affected (0.01 sec)
Rows matched: 3 Changed: 0 Warnings: 0
mysql>
mysql> select * from performance_schema.setup_consumers where name like 'events_stages_%';
+----------------------------+---------+
| NAME | ENABLED |
+----------------------------+---------+
| events_stages_current | YES |
| events_stages_history | YES |
| events_stages_history_long | YES |
+----------------------------+---------+
3 rows in set (0.01 sec)
mysql> update performance_schema.setup_instruments set enabled='YES',timed='YES' where name like 'stage/sql/%';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 120 Changed: 0 Warnings: 0
mysql> select * from performance_schema.setup_instruments where name like 'stage/sql/%';
2.执行SQL语句
mysql> select * from user where user_id=2222;
+---------+--------------+---------------+---------------------+
| user_id | user_name | user_email | created |
+---------+--------------+---------------+---------------------+
| 2222 | bill2222 | 123456@qq.com | 2020-02-09 12:24:32 |
+---------+--------------+---------------+---------------------+
1 row in set (0.01 sec)
mysql>
3.查看SQL资源统计
SELECT
thread_id,
event_id,
event_name,
timer_wait
FROM
performance_schema.events_stages_history
WHERE thread_id IN
(SELECT
thread_id
FROM
performance_schema.threads
WHERE processlist_id = 2452)
ORDER BY event_id;
+-----------+----------+--------------------------------+------------+
| thread_id | event_id | event_name | timer_wait |
+-----------+----------+--------------------------------+------------+
| 2477 | 1076 | stage/sql/checking permissions | 25424000 |
| 2477 | 1077 | stage/sql/Opening tables | 216525000 |
| 2477 | 1078 | stage/sql/init | 136345000 |
| 2477 | 1079 | stage/sql/System lock | 79226000 |
| 2477 | 1080 | stage/sql/optimizing | 43497000 |
| 2477 | 1081 | stage/sql/statistics | 256410000 |
| 2477 | 1082 | stage/sql/preparing | 108996000 |
| 2477 | 1083 | stage/sql/Creating tmp table | 36546000 |
| 2477 | 1084 | stage/sql/Sorting result | 950685000 |
| 2477 | 1085 | stage/sql/executing | 5021000 |
+-----------+----------+--------------------------------+------------+
10 rows in set (0.05 sec)
mysql>
来源：CSDN
作者：WarriorTan
链接：https://blog.csdn.net/jiaping0424/article/details/104333630