Thanks so much for your help!
Perhaps there’s a difference between how MacOS Activity Monitor reports threads, and how this is set in duplicacy. But when I have the duplicacy CLI running and I go to activity monitor to check the process, it reports “17” under the threads column. It stays there fairly consistently. When it first ramps up it’s smaller, and I’ve seen it go to 18, but with a long backup it seems to sit on 17.It’s not taking that much CPU or memory and I notice no hit to my system (M4).
I had already gone ahead – it seems prematurely, my mistake – and removed the revisions with missing chunks. This was an error because I forgot that the first revision (the only one without missing chunks) was a very small initial backup.
In any case, with those revisions removed, check
reports no errors . So I’m now running another backup
with about 1/5th of my data. I’ll then run check
immediately after that and see where we are.
OK, I get it – I just change it in preferences and then the new backup appears under a different snapshot ID. That makes sense – thanks.
EDIT to add: I still don’t know what caused this, but I have to guess it was my mistake. I wonder if I had a backup running and then loaded a launchctl plist that had the “runAtload” key set to “true.” Somehow this tried to check or prune while a backup was running. I don’t have evidence I did this, but it’s not out of the realm of possibility.