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From Christian Folini <>
Subject Re: [users@httpd] debugging strategies for httpd that kills the box
Date Fri, 16 Nov 2007 15:39:59 GMT
On Fri, Nov 16, 2007 at 10:06:50AM -0500, Greg Boyington wrote:
> >  - Play around with MaxRequestsPerChild. A typical value
> I will do -- I experimented with low values (100-1000) in addition to
> 0, but nothing seemed to correlate.  In my testing, the hangs would
> often occur long before this threshold was ever reached.

The directive means to let a child process die and fork
it anew after n individual request for this particular
child process.

You can try and keep an eye on these children with mod_status,
write it all into a logfile and reconstruct when the lockup
occurs. Not sure it's of any use though. ;(

You mentioned httpd -X. Maybe you try and follow
the process(es) during the lockup with strace/truss.

Besides, I forgot to mention, that there is mod_diagnostics
by Nick Kew. Itis mentioned here from time to time.
Nick will be able to give you specific hints on how to use

mod_forensic can also help to nail down the bad request. But it
sounds, like your problem is not about a specific request.

Otherwise, I am slowly running out of ideas and you have
done all your homework before. It's really hard to recommend
anything here. At least for me, but that does not say much.



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