if you don’t need the luxury of accessing these posts through the forum’s scripts, consider firing up phpMyAdmin. Generate an “archive”-table, copy the respective posts from mlf_entries and delete them from mlf_entries/mlf_entries_cache. Maybe that helps in speeding up the regular forum.

Good point. I have backed up and deleted the unneeded entries from mlf_entries. However, I don't see any way to associate the mlf_entries_cache with the main entries.

Would it be safe to simply delete all entries from mlf_entries_cache? Would it regenerate the cache on its own or would I be breaking the site?

Thanks for all the help!

P.S. Since I really just wanted a record that I could look back on when needed (which would hopefully be never), I simply exported the entries I didn't need online anymore as a backup. No need really to move them into another table.