查看mysql数据库容量大小
第一种情况：查询所有数据库的总大小，方法如下：
mysql> use information_schema;
mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),\’MB\’) as data from TABLES;
+———–+
| data |
+———–+
| 3052.76MB |
+———–+
1 row in set (0.02 sec)
统计一下所有库数据量
每张表数据量=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
统计每个库大小：
SELECT
table_schema,SUM(AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH)/1024/1024 AS total_mb
FROM information_schema.TABLES group by table_schema;
第二种情况：查看指定数据库的大小，比如说：数据库test，方法如下：
mysql> use information_schema;
mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),\’MB\’) as data from TABLES where table_schema=\’test\’;
+———-+
| data |
+———-+
| 142.84MB |
+———-+
1 row in set (0.00 sec)
1.查看所有数据库各容量大小
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)\’
from information_schema.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;
2.查看所有数据库各表容量大小
select
table_schema as \’数据库\’,
table_name as \’表名\’,
table_rows as \’记录数\’,
truncate(data_length/1024/1024, 2) as \’数据容量(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;
3.查看指定数据库容量大小
例：查看mysql库容量大小
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)\’
from information_schema.tables
where table_schema=\’mysql\’;
4.查看指定数据库各表容量大小
例：查看mysql库各表容量大小
select
table_schema as \’数据库\’,
table_name as \’表名\’,
table_rows as \’记录数\’,
truncate(data_length/1024/1024, 2) as \’数据容量(MB)\’,
truncate(index_length/1024/1024, 2) as \’索引容量(MB)\’
from information_schema.tables
where table_schema=\’mysql\’
order by data_length desc, index_length desc;
版权声明：本文为--smile原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。