查看所有库的大小 mysql> use information_schema; Database changed mysql> selectconcat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as datafrom TABLES; +----------+ | data | +----------+ | 104.21MB | +----------+ 1 row in set (0.11 sec) 查看指定库的大小 mysql> selectconcat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as datafrom TABLES where table_schema='jishi'; +---------+ | data | +---------+ | 26.17MB | +---------+ 1 row in set (0.01 sec) 查看指定库的指定表的大小 mysql> selectconcat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as datafrom TABLES where table_schema='jishi' andtable_name='a_ya'; +--------+ | data | +--------+ | 0.02MB | +--------+ 1 row in set (0.00 sec) 查看指定库的索引大小 mysql> SELECTCONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' MB') AS 'TotalIndex Size' FROM TABLES WHERE table_schema ='jishi'; +------------------+ | Total Index Size | +------------------+ | 0.94 MB | +------------------+ 1 row in set (0.01 sec) 查看指定库的指定表的索引大小 mysql> SELECTCONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' MB') AS 'TotalIndex Size' FROM TABLES WHERE table_schema ='test' and table_name='a_yuser'; +------------------+ | Total Index Size | +------------------+ | 21.84 MB | +------------------+ 1 row in set (0.00 sec) mysql> show create table test.a_yuser\G; *************************** 1. row*************************** Table: a_yuser Create Table: CREATE TABLE `a_yuser` ( `email` varchar(60) NOT NULL DEFAULT'', `user_name` varchar(60) NOT NULL DEFAULT'', KEY `cc` (`email`(5)), KEY `ccb` (`user_name`(5)), KEY `ccbc`(`email`(5),`user_name`(5)) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 1 row in set (0.00 sec) ERROR: No query specified mysql> select count(*) from test.a_yuser; +----------+ | count(*) | +----------+ | 1073607 | +----------+ 1 row in set (0.00 sec) mysql> 查看一个库中的情况... mysql> SELECTCONCAT(table_schema,'.',table_name) AS 'Table Name',CONCAT(ROUND(table_rows/1000000,4),'M') AS 'Number of Rows',CONCAT(ROUND(data_length/(1024*1024*1024),4),'G') AS 'Data Size',CONCAT(ROUND(index_length/(1024*1024*1024),4),'G') AS 'Index Size',CONCAT(ROUND((data_length+index_length)/(1024*1024*1024),4),'G')AS'Total'FROM information_schema.TABLES WHERE table_schema LIKE'test'; +---------------+----------------+-----------+------------+---------+ | Table Name | Number ofRows | Data Size | Index Size | Total | +---------------+----------------+-----------+------------+---------+ | test.a_br | 0.4625M| 0.0259G | 0.0171G| 0.0431G | | test.a_skuclr | 0.7099M | 0.0660G | 0.0259G |0.0919G | | test.a_yuser | 1.0736M | 0.0497G | 0.0213G |0.0710G | | test.test | 0.0000M| 0.0000G | 0.0000G| 0.0000G | +---------------+----------------+-----------+------------+---------+ 4 rows in set (0.13 sec)
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