mysql数据库查看各实例磁盘占用情况

1、总体查看：

use information_schema;

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;

2、查看整个数据库磁盘占用情况：

select sum(data_length/1024/1024) as data from tables ;

3、指定实例查看：

select sum(data_length/1024/1024) as data from tables where table_schema='table';