Strange load issue with 2.4.17

[Sebastian Hagedorn]

--On 13. Oktober 2014 17:35:25 +0200 Simon Matter <simon.matter at invoca.ch> 
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.

-- 
    .:.Sebastian Hagedorn - Weyertal 121 (Gebäude 133), Zimmer 2.02.:.
                 .:.Regionales Rechenzentrum (RRZK).:.
   .:.Universität zu Köln / Cologne University - ✆ +49-221-470-89578.:.
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