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

本文地址：https://blog.csdn.net/qq_41788609/article/details/107641212