I've set the apache confs to use the following
StartServers 512
ServerLimit 1024
MaxClients 1024
MinSpareServers 256
MaxSpareServers 512
MaxRequestsPerChild 100000
I reran the test with a smaller load (350 users as opposed to 1250). It didn't hit the server limit but I still get this error:
[Wed May 23 07:30:54 2007] [error] (70014)End of file found: ajp_ilink_receive() can't receive header
[Wed May 23 07:30:54 2007] [error] ajp_read_header: ajp_ilink_receive failed
[Wed May 23 07:30:54 2007] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (xxx.xxx.xxx.xxx)
Any other suggestions?
----- Original Message ----
From: Jim Jagielski <jim@xxxxxxxxxxx>
To: users@xxxxxxxxxxxxxxxx
Sent: Wednesday, May 23, 2007 12:51:11 PM
Subject: Re: Re: High volume issues using mod_proxy (balancer,http,ajp) on Apache 2.2.4 across multiple tomcat 5.5.23 clusters - Configuration issues or bugs?
Some pointers:
MaxRequestsPerChild 512
This means that after an Apache child process handles
512 requests, it will be killed off (and a replacement will
need to be forked). With 45+ million request per
hour, that's a lot of forking.
Min/MaxSpareServers 512
You are telling Apache that you want between 512
and 512 idle Apache processes. If you have more,
kill them off; less, add more. Can you see the
issue with this? :)
(actually, Apache internally tries to handle
this misconfig by setting Max to 513, but
still, that's a REAL NARROW BAND)
On May 23, 2007, at 1:41 PM, justin wright wrote:
> When I use the default settings apache immediately complains that
> it reaches the server limit. Therefore, I kept raising the limits
> until I reached the configuration listed below and still the CPU
> utilization on the apache box is less than 10% (Its a quad AMD box
> with plenty of memory). I've spent the past month pouring through
> the documents trying to figure out how to configure these
> settings. What would you suggest for a high-volume site that can
> serve up 45+ million requests in an hour?
>
>
> ----- Original Message ----
> From: Jim Jagielski <jim@xxxxxxxxxxx>
> To: users@xxxxxxxxxxxxxxxx
> Sent: Wednesday, May 23, 2007 12:29:31 PM
> Subject: Re: Re: High volume issues using mod_proxy
> (balancer,http,ajp) on Apache 2.2.4 across multiple tomcat 5.5.23
> clusters - Configuration issues or bugs?
>
>
> On May 23, 2007, at 1:23 PM, justin wright wrote:
>
>>
>> <IfModule mpm_prefork_module>
>> StartServers 512
>> ServerLimit 1024
>> MaxClients 1024
>> MinSpareServers 512
>> MaxSpareServers 512
>> MaxRequestsPerChild 512
>> </IfModule>
>>
>
> I would suggest reading at least *some* of the documents
> on how to configure Apache. Apache is spending
> loads of time thrashing and killing/creating processes
> that it's a wonder it's working at all.
>
>
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