Morning, 

Updated to latest oxide today and now the server is running so laggy (3fps)

What can I run to diagnose?

Tried removing all plugins but no difference, I've had to restore from pre update backup.

Had 4 reports on my end too.... 1-3 fps across the board.... All plugins removed and tested.... and they have rolled back to previous backups to fix.

Just locked up again, fps issue back.

The changes in the latest Oxide build would have not changed anything with your FPS. The only relevant change was to move a hook, but it is still being called the same amount as it was in the previous.

That's what I thought, Can you advise anything I can to do diagnose the issue? 

I now have a memory leak issue coming from my service provider they said is due to a bad mod (their words).