4 ms·
Not sure what the deal is, I haven't really dug into it at all, but pretty much any time I run htop I can see a 100% CPU process like: 2710046 root 20
by linsomniac 5y ago
Not sure what the deal is, I haven't really dug into it at all, but pretty much any time I run htop I can see a 100% CPU process like:
2710046 root 20 0 1121M 85744 6848 S 102. 0.3 0:05.76 /sbin/zsysd
- rincebrain 5y agozsysd is an Ubuntu daemon for managing ZFS things, not something OpenZFS provides. So if that is the only process spinning, that is probably specific to them. (Not that OZFS native encryption doesn't have flaws; I am probably the last person on the planet to pick to argue that point. But I don't know that this is among them.)
- exikyut 5y agoI wonder what `sudo perf top` says it's doing (in terms of heaviest symbols). That would probably be the most useful thing to stick on the end of a pitchfork :P (The command accepts a `-p <pid>` parameter; without that it'll profile the whole system (I make this sound much heavier than it is).)
- E39M5S62 5y agozsysd is Ubuntu's zsys tool. It's notoriously bad at burning CPU as your number of snapshots increase. It has some pretty serious flaws as well that can result in total data loss on the local drive due to aggressive / incorrect snapshot pruning.