查看 MySQL 已经运行多长时间了

用这条语句简单，明了又精确：mysql> status;

mysql  Ver 14.14 Distrib 5.5.28, for Linux (x86_64) using readline 5.1 
Connection id: 1027507 
Current database:  
Current user: root@localhost 
SSL: Not in use 
Current pager: stdout 
Using outfile: '' 
Using delimiter: ; 
Server version: 5.5.28-log Source distribution 
Protocol version: 10 
Connection: Localhost via UNIX socket 
Server characterset: utf8 
Db     characterset: utf8 
Client characterset: utf8 
Conn.  characterset: utf8 
UNIX socket: /opt/mysql/mysql.sock 
Uptime: 11 days 15 hours 1 min 7 sec                / 这里显示的就是您的数据库运行的时间

        11天，15小时，1分，7秒