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Subject: Re: apache server can't spawn child processes
In-Reply-To: <Pine.BSF.4.01.9910191309550.22740-100000@purple.nugate.com> from "D. Alex Neilson" at "Oct 19, 1999  1:11:30 pm"
To: neilson@purple.nugate.com (D. Alex Neilson)
Date: Tue, 19 Oct 1999 16:22:38 -0400 (EDT)
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From: danh@wzrd.com (Dan Harnett)
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Hello,

In your httpd.conf file, what do you have MaxRequestsPerChild set
to?  It is possible you have this set too low.  It is set to 30 by
default I believe in a stock Apache (not using the ports system),
and you will see that error on a heavily loaded server.  Try increasing
it to 10000000 or so.

Dan Harnett

> Synopis: apache server can't spawn child processes
> 
> Hello,
> 
>   I've got 2.2.6 (yeah, I'll upgrade one of these days) which
> runs a very busy server of typically 300 nobody users (what apache
> children run as), and cgi programs can't spawn, getting this in the
> error log for this server:
> 
> 	(35)Resource temporarily unavailable:
> 		couldn't spawn child process:
> 		/content/somesite/public-html/something/cgi/step1.cgi
> 
> I've beefed up maxusers to 512 which I now realize is overkill,
> increased CHILD_MAX to 512 in /usr/include/syslimits.h, tweaked
> the login.conf to this (I presume nobody maps to default):
> 
> 	default:\
> 	        :cputime=infinity:\
> 	        :datasize-cur=88M:\
> 	        :stacksize-cur=64M:\
> 	        :memorylocked-cur=40M:\
> 	        :memoryuse-cur=256M:\
> 	        :filesize=infinity:\
> 	        :coredumpsize=infinity:\
> 	        :maxproc-cur=512:\
> 	        :openfiles-cur=8191:\
> 	        :priority=0:\
> 	        :requirehome@:\
> 	        :umask=022:\
> 	        :tc=auth-defaults:
> 
> Here's how busy the server is right now (1pm PDT):
> 
> 	24.5 requests/sec - 437.6 kB/second - 17.9 kB/request
> 	295 requests currently being processed, 30 idle servers 
> 
> I don't know what ceiling I'm banging up against and would appreciate
> pointers on beefing up system parameters to accomodate large apache
> server loads.
> 
> Thanks,
> 
> Alex
> 
> 
> 
> 
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