当前位置:Gxlcms > mysql > MySQL如何查询当前正在运行的SQL语句

MySQL如何查询当前正在运行的SQL语句

时间:2021-07-01 10:21:17 帮助过:20人阅读

通过status命令,查看Slow queries这一项,如果值长时间>0,说明有查询执行时间过长 以下是引用片段: mysql> status; -------------- mysql Ver 11.18 Distrib 3.23.58, for redhat-linux-gnu (i386) Connection id: 53 Current database: (null) Current us

通过status命令,查看Slow queries这一项,如果值长时间>0,说明有查询执行时间过长

以下是引用片段:

 mysql> status;
--------------
mysql Ver 11.18 Distrib 3.23.58, for redhat-linux-gnu (i386)
Connection id: 53
Current database: (null)
Current user: root@localhost
Current pager: stdout
Using outfile: ''
Server version: 5.0.37-log
Protocol version: 10
Connection: Localhost via UNIX socket
Client characterset: latin1
Server characterset: latin1
UNIX socket: /tmp/mysql.sock
Uptime: 4 days 16 hours 49 min 57 sec
Threads: 1 Questions: 706 Slow queries: 0 Opens: 177 Flush tables: 1 Open tables:

52 Queries per second avg: 0.002
--------------


这时再通过show processlist命令来查看当前正在运行的SQL,从中找出运行慢的SQL语句,找到执行慢的语句后,再用explain命令查看这些语句的执行计划。

mysql> show processlist;

+----+------+-----------+------+---------+------+-------+------------------+

| Id | User | Host | db | Command | Time | State | Info |

+----+------+-----------+------+---------+------+-------+------------------+

| 53 | root | localhost | NULL | Query | 0 | NULL | show processlist |

+----+------+-----------+------+---------+------+-------+------------------+


【相关文章】

  • 诊断Oraacle数据库Hanging问题
  • MySQL与标准的兼容性
【责任编辑:碧海蓝天 TEL:(010)68476606】

人气教程排行