MySQL库表状态查询

对于一个mysql连接或者一个线程，任何时刻都有一个状态，表示其当前正在做什么。一般使用show full processlist查看。

+---------+-------------+-------------------+------+---------+------+-------+-----------------------+
| Id      | User        | Host              | db   | Command | Time | State | Info                  |
+---------+-------------+-------------------+------+---------+------+-------+-----------------------+
| 2547225 | operator@RR | 10.3.18.205:60253 | fb   | Query   |    0 | NULL  | show full processlist |
| 2548100 | operator@RR | 10.4.19.83:51754  | fb   | Sleep   |    1 |       | NULL                  |
| 2548101 | operator@RR | 10.4.19.83:53661  | fb   | Sleep   |    1 |       | NULL                  |
| 2548102 | operator@RR | 10.4.19.83:45808  | fb   | Sleep   |    1 |       | NULL                  |
| 2548103 | operator@RR | 10.4.19.83:58881  | fb   | Sleep   |    1 |       | NULL                  |
| 2548104 | operator@RR | 10.4.19.83:33521  | fb   | Sleep   |    1 |       | NULL                  |
+---------+-------------+-------------------+------+---------+------+-------+-----------------------+

show full processlist