mysql> use information_schema; Database changed 2、查询所有数据的大小 mysql> select concat(round(sum(DATA_LENGTH/1024/1024), 2), 'MB') -> as data from TABLES; +-----------+ | data | +-----------+ | 6674.48MB | +-----------+ 1 row in set (16.81 sec) 3、查看指定数据库实例的大小,比如说数据库 forexpert mysql> select concat(round(sum(DATA_LENGTH/1024/1024), 2), 'MB') -> as data from TABLES where table_schema='forexpert'; +-----------+ | data | +-----------+ | 6542.30MB | +-----------+ 1 row in set (7.47 sec) 4、查看指定数据库的表的大小,比如说数据库 forexpert 中的 member 表 mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data -> from TABLES where table_schema='forexpert' -> and table_name='member'; +--------+ | data | +--------+ | 2.52MB | +--------+ 1 row in set (1.88 sec)
mysql查看执行的sql进程,并解锁
show processlist; //杀掉进程 kill id //查看被锁表 show OPEN TABLES where In_use > 0;