Script to check how much database space is consumed in the hard disk.

database_sizes.sql

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;

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