[phpa] Re: Page not found problem

Hi,

Perhaps you could reproduce the traffic with ab.

Can you send an entire compressed error log from a restart until you get 
the page not found errors.  I think IE returns page not found when it gets 
an empty response. PHP 4.0.6 is known to have memory problems with arrays, 
and so you could be getting server crashes from PHP itself. Perhaps these 
show up more often once phpa is installed. 4.0.7RC3 or 4.1.1 fixes those 
bugs.

I'd also suggest turning on shm_logging so we get a bit more info.

You could also reduce the max requests value for apache processes. It may 
currently be unlimited or large, e.g. 10000, but reducing it to say 1000 or 
even less would mean that no apache process would handle more than that 
number of requests before stopping. The parent apache would then spawn 
another process if necessary.

My production server with red hat was configured for max requests as 100, 
which seemed a bit low, but setting to a lowish figure might be prudent.

You'll take a minor performance hit each time a new process is spawned, but 
this really should be negligible.

I've been meaning to produce a production build that does checking for 
memory corruption (it does this in a debug build currently). If you have 
continued problems then it would be worth getting that off me and using it, 
but that wouldn't actually solve anything so I'd try the above ideas too.

nick



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