# very accurate in calculating 'innodb_buffer_pool_chunk_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;

# Returns RIBS in GB
# innodb_buffer_pool_chunk_size = 17G