MySQL 数据库空间使用大小查询的方法实现

select
  table_schema as '数据库',
  sum(table_rows) as '记录数',
  sum(truncate(data_length/1024/1024,2)) as '数据容量(mb)',
  sum(truncate(index_length/1024/1024,2)) as '索引容量(mb)',
  sum(truncate((data_length+index_length)/1024/1024,2)) as '总大小(mb)'
from information_schema.tables
group by table_schema
order by sum(data_length) desc;

select
  table_schema as '数据库',
  sum(table_rows) as '记录数',
  sum(truncate(data_length/1024/1024,2)) as '数据容量(mb)',
  sum(truncate(index_length/1024/1024,2)) as '索引容量(mb)',
  sum(truncate((data_length+index_length)/1024/1024,2)) as '总大小(mb)'
from information_schema.tables
where table_schema='sftzhzx_jy-241220'
group by table_schema
order by sum(data_length) desc;

select
  table_schema as '数据库',
  sum(table_rows) as '记录数',
  sum(truncate(data_length/1024/1024,2)) as '数据容量(mb)',
  sum(truncate(index_length/1024/1024,2)) as '索引容量(mb)',
  sum(truncate((data_length+index_length)/1024/1024,2)) as '总大小(mb)'
from information_schema.tables
where table_schema='sftzhzx_jd'
group by table_schema
order by sum(data_length) desc;

select
  table_schema as '数据库',
  sum(data_length + index_length)/1024/1024 as '总大小(mb)'
from information_schema.tables
where table_schema = 'your_database_name'
group by table_schema;

select
  table_schema as '数据库',
  sum(data_length + index_length)/1024/1024 as '总大小(mb)'
from information_schema.tables
where table_schema = 'sftzhzx_jy-241220'
group by table_schema;

select
  table_schema as '数据库',
  sum(data_length + index_length)/1024/1024 as '总大小(mb)'
from information_schema.tables
where table_schema = 'sftzhzx_jd'
group by table_schema;

select
  table_name as '表名',
  truncate(data_length/1024/1024,2) as '数据容量(mb)',
  truncate(index_length/1024/1024,2) as '索引容量(mb)',
  truncate((data_length+index_length)/1024/1024,2) as '总大小(mb)'
from information_schema.tables
where table_schema = 'your_database_name'
order by (data_length + index_length) desc;

select
  table_name as '表名',
  truncate((data_length + index_length)/1024/1024,2) as '总大小(mb)'
from information_schema.tables
where table_schema = 'your_database_name'
  and table_name = 'your_table_name';

[mysqld]
innodb_data_file_path = ibdata1:10m:autoextend

set global innodb_file_per_table = 1;

optimize table your_table_name;