mysql>show variables like '%timeout';
打印结果如下: +----------------------------+-------+ | Variable_name | Value | +----------------------------+-------+ | connect_timeout | 5 | | delayed_insert_timeout | 300 | | interactive_timeout | 28800 | | net_read_timeout | 30 | | net_write_timeout | 60 | | slave_net_timeout | 3600 | | wait_timeout | 28800 | +----------------------------+-------+ interactive_timeout 需在mysql_connect()设置CLIENT_INTERACTIVE选项后起作用,并被赋值为wait_timeout;mysql>set wait_timeout = 10; 对当前交互链接有效;mysql>set interactive_timeout = 10; 对后续起的交互链接有效;该超时时间单位是秒,从变量从上次SQL执行后算起;当前空闲若超过该时间,则也会被强制断开。