mysql processlist

node2:/root#mysql -uroot -p1234567 --socket='/data01/mysql/mysql.sock' -e"show processlist" 
Warning: Using a password on the command line interface can be insecure.
+----+------+---------------------+--------+---------+------+-------+------------------+
| Id | User | Host                | db     | Command | Time | State | Info             |
+----+------+---------------------+--------+---------+------+-------+------------------+
| 30 | root | 192.168.137.1:54289 | django | Sleep   |  334 |       | NULL             |
| 31 | root | 192.168.137.1:54290 | django | Sleep   |  334 |       | NULL             |
| 33 | root | node2:42138         | tlcb   | Sleep   |  818 |       | NULL             |
| 78 | root | localhost           | DEVOPS | Sleep   |   16 |       | NULL             |
| 88 | root | localhost           | NULL   | Query   |    0 | init  | show processlist |
+----+------+---------------------+--------+---------+------+-------+------------------+
node2:/root#

21.16 The INFORMATION_SCHEMA PROCESSLIST Table

PROCESSLIST表提供了信息关于运行的线程 

The PROCESSLIST table has these columns:

ID

连接标识符,这与show processlist 语句的ID列是一样的

User

执行语句的MYSQL用户,system user的值指向一个非客户端线程 通过server 派生来处理内部任务

HOST

执行SQL语句的客户端的名字(系统用户除外,没有主机名)

DB

如果选择了默认数据库,则为数据库,否则为空

COMMAND

线程正在执行的命令

TIME

线程处于当前状态的事件,对于slave sql线程, 值是最后复制事务的事件和salve机器当前的时间

的秒数