mysql查询数据库的数据量大小

查询数据库最大连接数

 

show variables like \'%max_connections%\';

 

查询数据库连接超时时间单位(s)

 

Show variables like ‘wait_timeout’;

 

查询各个数据库量的大小

 

select TABLE_SCHEMA,CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),\'MB\') dbsize from information_schema.tables group by TABLE_SCHEMA ;

 

查询各个数据库量的大小

 

select TABLE_SCHEMA,CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),\'MB\') dbsize from information_schema.tables group by TABLE_SCHEMA ;

 

查询指定数据库量的大小

 

select \'数据库大小\',CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),\'MB\') dbsize from information_schema.tables where table_schema=\'库名\';

 

查询某个表的大小

 

select \'表大小\',CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),\'MB\') tbsize
from information_schema.tables
where table_schema=\'库名\' and table_name=\'表名\';

 

查询各个表的大小

 

select table_name,\'表大小\',CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),\'MB\') tbsize
from information_schema.tables
where table_schema=\'库名\'
group by table_name=\'表名\';