Quick tip: use the below query to check how large each of your MySQL 5 databases is.

mysql> SELECT
  concat(round(sum(table_rows)/1000000,2),'M') as rows,
  concat(round(sum(data_length)/(1024*1024*1024),2),'G') as data,
  concat(round(sum(index_length)/(1024*1024*1024),2),'G') as idx,
  concat(round(sum((data_length+index_length))/(1024*1024*1024),2),'G') as total_size
FROM information_schema.TABLES
GROUP BY table_schema;
| table_schema                | rows  | data  | idx   | total_size |
| information_schema          | NULL  | 0.00G | 0.00G | 0.00G      | 
| xxxxxxxxx_xxxx_xxxx_staging | 0.93M | 0.08G | 0.01G | 0.09G      | 
2 rows in set (0.03 sec)
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