data_length – Database Research & Development https://www.dbrnd.com BIGData | NoSQL | MSSQL | MySQL | PostgreSQL Tue, 21 Nov 2017 06:05:45 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.4 Determine free and occupied size of Tables and Database into MySQL https://www.dbrnd.com/2015/08/determine-free-and-occupied-size-of-tables-and-database-into-mysql/ Fri, 14 Aug 2015 20:05:12 +0000 https://www.dbrnd.com/?p=374

In this post, I am sharing two different scripts to find the free and occupied size of Table and Database in MySQL.

This script is very useful for DBA for checking the size of tables and databases.

If you find freer space, DBA has to recover free space.

Please read interesting about MVCC:

Below are scripts:

/* Script for Database */
SELECT 
	table_schema AS DataBase_Name
	,ROUND(sum( data_length + index_length ) / 1024 /1024,1) AS OccupiedSize_inMB
    ,ROUND(sum( data_free )/ 1024 / 1024,1) AS FreeSpace_inMB 
FROM information_schema.TABLES 
GROUP BY table_schema ;
/* Script for Tables */
SELECT table_Name  AS Table_Name,
   ROUND(SUM(data_length + index_length) / 1024 / 1024, 1) AS TableSize_InMB
   ,ROUND(sum( data_free )/ 1024 / 1024,1) AS FreeSpace_inMB
FROM   information_schema.tables 
WHERE Table_Schema = 'db_name'
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