Never trust your process monitor. On occasion, you'll need/want to bounce your process scheduler* and quick check of process monitor will ensure that you won't wack any running jobs … but beware, the process monitor page can and will lie to you. Use the following SQL (current as of PT 8.4X) to query the database to actually see what's running.
(* bouncing PRCS to remove file and memory cache is not, always, in my opinion, needed as it was a few years ago; however, it's undenieable effective at ruling out cache issues).