#查看每个数据库所占磁盘大小 SELECT TABLE_SCHEMA AS "库名", , ) AS "表所占空间(MB)", , ) AS "索引所占空间(MB)", ,) AS "空间累计(MB)" FROM information_schema.`TABLES` GROUP BY `TABLE_SCHEMA`;  #查看某个数据库各表所占磁盘大小 SELECT TABLE_NAME, , ) AS "DATA_…

有时候我们可能需要了解数据库中各个表的容量及大小,好了解数据库情况. 现只需要一条SQL就可以直观的展示出来. 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 informat…

查询Mysql数据库所有数据库所占磁盘空间大小: /,),' MB') as data_size, concat(truncate(sum(index_length)//,),'MB') as index_size from information_schema.tables group by TABLE_SCHEMA order by data_length desc; 查询某个数据库的所有表所占存储空间大小:只要加个where条件:where TABLE_SCHEMA = '数据库名称' /…

摘要:本文讲述4种查看java对象所占内存大小的方法 本文分享自华为云社区<查看java对象所占内存大小>,作者:xiewenci. 计算java对象所占内存大小 1.使用jdk8自带API 使用这种jdk8方式时,Open JDK 不是天然支持的,需要set一下环境变量 System.setProperty("java.vm.name","Java HotSpot(TM) "); System.out.println(ObjectSizeCalcula…

http://blog.csdn.net/bzfys/article/details/55252962 1. 查看该数据库实例下所有库大小,得到的结果是以MB为单位 <span class="keylink">mysql</span>> select table_schema,sum(data_length)/1024/1024 as data_length,sum(index_length)/1024/1024 \ as index_length,sum…

.查询所有数据库占用磁盘空间大小 select TABLE_SCHEMA, concat(,),' MB') as data_size, concat(,),'MB') as index_size from information_schema.tables group by TABLE_SCHEMA ORDER BY data_size desc; .查询单个库中所有表磁盘占用大小 select TABLE_NAME, concat(,),' MB') as data_size, concat…

select segment_name, bytes/1024/1024 from user_segments S where S.segment_type = 'TABLE' AND S.segment_name = ‘XXXX';//表名   但对于有blob字段的不适用,blob内容不会被统计,统计blob大小的方法:   select SEGMENT_NAME, TABLESPACE_NAME, TO_CHAR(SUM(BYTES) / (1024 * 1024), '999G999D9…

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size, concat(truncate(index_length/1024/1024,2),' MB') as index_size from information_schema.tables where TABLE_SCHEMA = '数据库名' order by data_length desc;…

/*单个表每个索引的大小*/ SELECT sum(stat_value) pages, table_name part, index_name, concat(,),'M',' rows') * @@innodb_page_size size FROM mysql.innodb_index_stats WHERE table_name = '你的表名' AND database_name = '你的数据库名' AND stat_description LIKE 'Number of pages…

1.登录mysql 2.使用命令:use information_schema; 3.使用命令:select table_name,table_rows from tables where TABLE_SCHEMA = 'emphant' order by table_rows desc;…