數據庫容量信息查看語句

查詢所有數據庫的總大小

mysql> use information_schema;

mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES;

統計所有庫數據量

說明：每張表數據量=AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH

 

SELECT
SUM(AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH)/1024/1024 AS total_mb
FROM information_schema.TABLES;

統計每個庫的大小

SELECT
table_schema,SUM(AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH)/1024/1024 AS total_mb
FROM information_schema.TABLES group by table_schema;

查看指定數據庫(ORM庫)容量大小（常用）

說明：容量大小值接近於備份此庫的sql文件的大小！

mysql> use information_schema;

mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES where table_schema='ORM';

查看所有庫各容量大小（常用）

select
table_schema as '數據庫',
sum(table_rows) as '記錄數',
sum(truncate(data_length/1024/1024, 2)) as '數據容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;

 

查看所有庫各表容量大小

select
table_schema as '數據庫',
table_name as '表名',
table_rows as '記錄數',
truncate(data_length/1024/1024, 2) as '數據容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'
from information_schema.tables
order by data_length desc, index_length desc;

 

查看指定庫容量大小

select
table_schema as '數據庫',
sum(table_rows) as '記錄數',
sum(truncate(data_length/1024/1024, 2)) as '數據容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tables
where table_schema='mysql';

 

查看指定庫各表容量大小

select
table_schema as '數據庫',
table_name as '表名',
table_rows as '記錄數',
truncate(data_length/1024/1024, 2) as '數據容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'
from information_schema.table
where table_schema='mysql'
order by data_length desc, index_length desc;