mysql

Recently I was investigating how big my innodb buffer pool should be. While looking for more detailed info I came across this really handy mysql query which gives in result number of GB to which you should set your innodb_buffer_pool_size

SELECT CEILING(Total_InnoDB_Bytes*1.6/POWER(1024,3)) RIBPS FROM
(SELECT SUM(data_length+index_length) Total_InnoDB_Bytes
FROM information_schema.tables WHERE engine='InnoDB') A;

 

To query what is your current data usage you can use the following

SELECT (PagesData*PageSize)/POWER(1024,3) DataGB FROM
(SELECT variable_value PagesData
FROM information_schema.global_status
WHERE variable_name='Innodb_buffer_pool_pages_data') A,
(SELECT variable_value PageSize
FROM information_schema.global_status
WHERE variable_name='Innodb_page_size') B;

With this knowledge you should not have any problems with tuning your mysql 😉