如何获得 MySQL 数据库的真实大小?

How to Get True Size of MySQL Database?(如何获得 MySQL 数据库的真实大小?)

问题描述

我想知道我的 MySQL 数据库使用了多少空间，以便选择 Web 主机.我找到了命令 SHOW TABLE STATUS LIKE 'table_name' 所以当我做查询时，我得到这样的东西:

I would like to know how much space does my MySQL database use, in order to select a web host. I found the command SHOW TABLE STATUS LIKE 'table_name' so when I do the query, I get something like this:

Name       | Rows | Avg. Row Length | Data_Length | Index Length
----------   ----   ---------------   -----------   ------------
table_name   400          55            362000        66560

• 数字四舍五入.

那么我是否有 362000 或 400*362000 = 144800000 字节的数据用于该表?索引长度是什么意思?谢谢！

So do I have 362000 or 400*362000 = 144800000 bytes of data for this table? And what does Index Length mean? Thanks !

推荐答案

来自 S. Prakash，位于 MySQL 论坛:

From S. Prakash, found at the MySQL forum:

SELECT table_schema "database name",
    sum( data_length + index_length ) / 1024 / 1024 "database size in MB",
    sum( data_free )/ 1024 / 1024 "free space in MB"
FROM information_schema.TABLES
GROUP BY table_schema; 

或者在一行中更容易复制粘贴:

Or in a single line for easier copy-pasting:

SELECT table_schema "database name", sum( data_length + index_length ) / 1024 / 1024 "database size in MB", sum( data_free )/ 1024 / 1024 "free space in MB" FROM information_schema.TABLES GROUP BY table_schema; 

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