<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Apologies if I'm misreading, but that bug suggests many processes are created over a period of time. In contrast your grab shows the number of processes hasn't grown but the load has grown exponentially.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">I'd say it's not the same bug.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">The grab shows system CPU staying around the same, contrary to your description - which of them is correct? If load has increased while the CPU has dropped, I'd say you're still waiting on IO.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 13 October 2014 15:35, Sebastian Hagedorn <span dir="ltr"><<a href="mailto:Hagedorn@uni-koeln.de" target="_blank">Hagedorn@uni-koeln.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
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.<br>
<br>
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:<br>
<br>
<a href="https://bugzilla.cyrusimap.org/show_bug.cgi?id=3744" target="_blank">https://bugzilla.cyrusimap.<u></u>org/show_bug.cgi?id=3744</a><br>
<br>
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?<br>
<br>
Thanks<span class="HOEnZb"><font color="#888888"><br>
Sebastian<br>
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