A measure to reduce the frequency of the hangs is to use little swap space.
Here's an extract of my system log: syslog.7.gz:Sep 28 19:20:00 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.7.gz:Sep 28 22:19:03 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.7.gz:Sep 29 04:47:32 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.7.gz:Sep 29 07:16:44 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 29 13:35:04 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 29 13:35:04 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 29 17:27:41 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 29 21:43:55 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 29 21:43:55 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 30 03:30:53 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.6.gz:Sep 30 07:50:10 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.5.gz:Sep 30 12:48:52 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.5.gz:Sep 30 12:48:55 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.5.gz:Sep 30 22:07:09 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.5.gz:Oct 1 04:49:01 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.4.gz:Oct 1 11:07:24 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.4.gz:Oct 1 13:33:58 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 2 10:59:56 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 2 13:52:15 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 2 13:52:16 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 2 21:44:36 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 3 01:08:25 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 3 09:26:54 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 3 13:30:52 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 3 17:25:08 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. syslog.3.gz:Oct 3 21:44:55 quimper rtkit-daemon[2231]: The canary thread is apparently starving. Taking action. Up until Oct 3, I got 2 to 6 hangs per day (each lasting minutes or hours). In these times I was using between 6 and 10 GB of swap space (in addition to the 16 GB of RAM my machine has). In the evening of Oct 3, I killed and restarted a process which was eating several GB of virtual memory (plasmashell - a well-known memory hog). Now, the last 3 days, I'm using less than 1 GB of swap space - and zero hangs happened. So this leaves two hypotheses: a) The hangs occur when a lot of swap space is in use. b) plasmashell not only leaks memory but also some other kind of resources. When these resources get scarce, the hangs occur. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1712858 Title: system freezes occasionally for several minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1712858/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
