> --On 13. Oktober 2014 17:35:25 +0200 Simon Matter <simon.matter@xxxxxxxxx> > wrote: > >>> Hi, >>> >>> for the last week we have seen strange load issues on our Cyrus server. >>> All >>> of a sudden the load increases to several thousands, user CPU goes down >>> to basically zero, system CPU spikes. In the past we've had trouble >>> with >>> poor I/O performance, but that went along with an increase in Wait I/O. >>> We don't >>> see that now. vmstat shows a massive increase in context switches. When >>> the >>> system reaches this state, all we can do is restart Cyrus or reboot the >>> machine if that doesn't work anymore. >>> >>> I'm attaching a Ganglia screenshot that shows the problem clearly. When >>> the >>> problem exists, there's not much we can do to analyze it. A colleague >>> suggested that what we see could be related to this bug: >>> >>> https://bugzilla.cyrusimap.org/show_bug.cgi?id=3744 >>> >>> It was reported for 2.4.16, and it sounds as if it has been fixed, but >>> is >>> that fix really part of 2.4.17? Any other ideas? >> >> Is this a physical host or running virtualized? > > It's virtualized, but it's been that way for more than a year. Is this by any chance running on KVM, maybe on an AMD cpu? ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
