Sluggish Performance. Large Collection

Left it with old database. Playlists reside there (in the database). I purchased a year’s premium subscription to Soundiiz (to save the playlists), but Soundiiz will not save tracks that cannot be found (in this case, the various artists tracks). I could get everything working (all 286,000 tracks) and then destroy the database and start over, but if I can listen to all of my music without undue delays I don’t think I’ll be doing that.