Cannot recover from "ERROR couldn't save system state: Minimum free space to take a snapshot and preserve ZFS performance is 20%. Free space on pool "bpool" is 15%."

[pjgoodall]

Describe the bug In the last week the normal zsys sytem snapshot process associated with updating packages on my system fails with the following error message:

ERROR couldn't save system state: Minimum free space to take a snapshot and preserve ZFS performance is 20%.
Free space on pool "bpool" is 15%.

I have tried zsysctl service gc --all with no improvement. I have tried removing the oldest snapshots manually - no change to the problem. Advice on web forums seem very hit and miss - I have no confidence in 'experimental' fixes. Diagnostic advice is very sparse.

I have been using this system for about a year without any great difficulty

To Reproduce Change any package state that would normally cause a zsys snapshot to be taken.

Expected behavior A system snapshot to be taken when package install state is changed

For ubuntu users, please run and copy the following:

1. ubuntu-bug zsys --save=/tmp/report
2. Copy paste below /tmp/report content:

   I'd rather someone contacted me for this report. I don't really feel it is secure to make it public - a lot of system information.

Screenshots If applicable, add screenshots to help explain your problem.

Installed versions:

• OS: (/etc/os-release)

  NAME="Ubuntu"
  VERSION="20.04.2 LTS (Focal Fossa)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 20.04.2 LTS"
  VERSION_ID="20.04"
  

  • Zsysd running version: (zsysctl version output)

    zsysctl 0.4.8
    zsysd   0.4.8

Additional context Add any other context about the problem here.

[didrocks]

Hi, thanks for reporting this bug and sorry for this issue! This is related to issue #204 (I’ll dup it to that). Unfortunately, the best course of action right now is to zsysctl state remove manually some states (you can see the states id with zsysctl show).

That way, you will free up some spaces manually in your bpool. Another way is to reduce the minimal number of snapshots to keep before doing your GC run (this is done in the configuration file).

[pjgoodall]

Thanks Didier,

I will try to help out with #204

—