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From Grant <>
Subject [users@httpd] Re: apache service interruption
Date Sat, 27 Jul 2013 11:49:44 GMT
> My server has 4GB RAM and uses nginx as a reverse proxy to apache.  A
> little while ago my website became inaccessible for about 30 minutes.
> I checked my munin graphs and it looks like apache processes spiked to
> about 29 during this time which is many times greater than usual.  I
> have MaxClients at 30 and the error log verifies that MaxClients was
> not reached.  The strange part is system disk latency shows a spike
> during the interruption which is only very slightly greater than other
> spikes which did not interrupt service.  System CPU, memory, and swap
> usage don't show anything interesting at all.
> Does this make sense to anyone?  Should I decrease MaxClients?
> - Grant

I've looked over my access_log and I can see there is a particular IP
which was making many requests during the interruption.  Since munin
does not show there was an excessive amount of memory or CPU usage,
lowering MaxClients won't help?

- Grant

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