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Date: Sun, 26 Sep 2004 01:38:56 +0100 (BST)
From: Nick Kew <nick@webthing.com>
To: users@httpd.apache.org
In-Reply-To: <4155DC14.2010008@chezphil.org>
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Subject: Re: [users@httpd] How to limit simultaneous CGI processes?

On Sat, 25 Sep 2004, Phil Endecott wrote:

> The CGI program uses lots of memory.  Running one or two instances at
> the same time is fine, but many more than that and the (virtual) machine
> starts to swap and slows down horribly.  So I'd like to limit the number
> of simultaneous instances of the CGI process that Apache will start to a
> small number (and queue, rather than discard, additional requests).
> However, I don't want to limit the serving of static pages in any way.

Perhaps the nearest thing to that available is mod_load_average, from
http://force-elite.com/~chip/archives/mod_load_average-0.1.0-test3.tar.bz2

That works on load average.  If you substitute a syscall that returns
memory usage (read from /proc if TFM doesn't suggest anything better)
it should do what you want.

-- 
Nick Kew

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