数据库教程:mysql查看数据库或表的占用磁盘空间

mysql查看数据库或表的占用磁盘空间

查看全部库

select TABLE_SCHEMA,  concat(truncate(sum(data_length)/1024/1024,2),' MB') as data_size,  concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size  from information_schema.tables group by TABLE_SCHEMA order by data_length desc; 

单个库

select concat(truncate(sum(data_length)/1024/1024,2),'MB') as data_size, concat(truncate(sum(max_data_length)/1024/1024,2),'MB') as max_data_size, concat(truncate(sum(data_free)/1024/1024,2),'MB') as data_free, concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size from information_schema.tables where TABLE_SCHEMA ='databasename'; 

单个库所有表

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB')as data_size,  concat(truncate(index_length/1024/1024,2),' MB') as index_size  from information_schema.tables where  TABLE_SCHEMA = 'databasename' group by TABLE_NAME order by data_length desc; 

注：sql语句中的databasename替换成自己要查的库名

或者通过磁盘统计大致查看：

mysql> select @@datadir; +-----------------------+ | @@datadir             | +-----------------------+ | /usr/local/mysql/var/ | +-----------------------+ 1 row in set (0.00 sec) 

]#du -h /usr/local/mysql/var/ --max-depth=1 

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