Switched from php to JavaScript

Hi there,
I have recently switched the counter mode within your plugin from php to Ajax, as the table in the database is getting pretty big and I need to save some space. I’ve already run into trouble because of my database’s size. Now that I switched to JS, how can I reduce the table size without losing the data it has collected so far? Is there a way to delete the data in the table without losing the stats or re-import them? Thanks in advance!

Best regards