mysql tuning queries

gistfile1.txt

# Database size
SELECT table_schema "Data Base Name",
    sum( data_length + index_length ) / 1024 / 1024 "Data Base Size in MB",
    sum( data_free )/ 1024 / 1024 "Free Space in MB"
FROM information_schema.TABLES
GROUP BY table_schema ;

# Size of each non-primary index
SELECT database_name, table_name, index_name, 
round(stat_value*@@innodb_page_size/1024/1024, 2) size_in_mb
FROM mysql.innodb_index_stats
WHERE stat_name = 'size' AND index_name != 'PRIMARY'
ORDER BY 4 DESC;

# Total size of non-primary indexes
SELECT sum(round(stat_value*@@innodb_page_size/1024/1024, 2)) size_in_mb
FROM mysql.innodb_index_stats
WHERE stat_name = 'size' AND index_name != 'PRIMARY';

# Actual GB of memory is in use by InnoDB Data in the InnoDB Buffer Pool
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;

# Recommended innodb_buffer_pool_size (includes 60% for growth)
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;