Clean up MySQL database

Hi, I am using OC/NC since many years for my research group, using 1&1/ ionos shared hosting.
Now, the MySQL database is getting to ~700 Mb/ 1,024 Mb max.
Is there a safe way, to clean up the MySQL database to reduce the storage size?

Best, Robert

I use mysqlcheck from time to time

and one of the benefits is a smaller DB size, afterwards :slight_smile:

with this i reduced my database to half.