Generate suggestions stuck? or just slow?

Is it possible to tell whether a task is truly stuck or just taking a while? This morning our full regen generate suggestions that we have on a schedule hung up and was processing from 5am into 1pm when we killed it. I am trying to run it again, and it’s been showing the same “last activity” time for over an hour. Normally this process takes about an hour and 15 mins to run. Should this last activity be changing more often? Or do I just need to be patient. I didn’t think to get logging on this run like I probably should have, and I don’t want to kill an hour long process just to start over again. Any tips?

figures. Just after I posted it, it finished…