Have had two or three more instances of this oom-killer behavior. Today we also had an incident where the system really DID run out of memory, but oom-killer did not kick in. I noticed the box being sluggish and disk churning, so I started system monitor and watched it happen. One of the firefox web containers was using up 11+ GB of memory. There was no available core memory, no available swap, and pretty soon desktop froze. Was unable to switch to a non-desktop pty or do anything, disk churning away relentlessly. Waited a little while, and then used the reset button on the box to reboot.
After that happened, we've installed upstream kernel and are running it right now. $> cat /proc/version Linux version 5.0.0-050000rc1-generic (kernel@tangerine) (gcc version 8.2.0 (Ubuntu 8.2.0-12ubuntu1)) #201901062130 SMP Mon Jan 7 02:32:47 UTC 2019 So far, unable to induce an oom-killer anomaly. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1811093 Title: Bogus "Out of Memory" compiz invoked oom-killer Status in linux package in Ubuntu: Incomplete Bug description: This has happened five times in the past week (four times in the past 36 hours): kernel: compiz invoked oom-killer: There is plenty of free core memory and almost no swap in use when it happens. This is Xenial with kernel version is 4.4.0-141, which contains fix to previously reported bug #1655842 "Out of Memory" oom-killer bug. I only have one week of logs to go by, which contain five occurrences. It has happened four times in the past 36 hours. Sometimes it happens right after logging into the unity / lighdm desktop (three out of five times), but not always. In four out of five occurrences a postgres job was running and oom-killer killed postgres. In the one other instance, postgres was quietly idle in the background and oom-killer killed Thunderbird. Kernel messages in syslog from five occurrences: compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=2, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=2, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 Additional info: $> lsb_release -rd Description: Ubuntu 16.04.5 LTS Release: 16.04 $> cat /proc/version_signature Ubuntu 4.4.0-141.167-generic 4.4.162 To manage notifications about this bug go to: free online bettinghttps://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811093/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp