Terrible performance

Sorry to be a bit slow on this, but I was really after the code I need to type in to run DBRepair programme. I realise I may have recently been told this, but am a little confused.

I followed the procedure to reset/reclaim PMS on DSM7 on Synology FAQ - Questions, Answers, and How-To's - #39 by ChuckPa and after deleting some old unused Authorised Devices, access to my media is definitely better. Do/should I still run DBRepair, or will Plex now ‘take care of itself’?