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From "Arnab Ganguly" <>
Subject Re: [users@httpd] Troubleshooting Apache Out of Memory Errors
Date Mon, 05 Jan 2009 10:03:25 GMT
Can you check the value for MaxMemFree ?

On Mon, Jan 5, 2009 at 3:27 PM, Plutocrat <> wrote:

> Thanks for the speedy reply Sander.
> Sander Temme wrote, On Monday, January 05, 2009 02:21 PM:
> > What do you mean when you say 'cli'?  Are you using mod_php, or running
> > it as a CGI?
> Hmm,. Not exactly sure. That was the output of php --version.
> I've got the php5_module loaded according to apachectrl -M and the
> cgi_module as well.
> With php --info I can see that it has the following compile flags
> '--enable-force-cgi-redirect''--enable-fastcgi'
> and further down it tells me
> Server API => Command Line Interface
> Does that help. I don't really know what I'm looking for here.
> >> memory_limit = 100M
> > Note that memory_limit is per script executed.  I believe the default is
> > 8Mb: what made you change that?
> Joomla seems to require it. I tried reducing to 10, 20, 32, 64, but Joomla
> wouldn't even display a page, so I put it back to 100Mb. So maybe this is
> the key. Joomla is somehow sucking up too much memory, and when it gets hit
> hard, it fills up the memory too quick. If PHP is running as an apache
> module then obviously httpd would be showing as the culprit in the ps and
> top commands. Hmmm. Any suggestions how I can get more information on
> Joomla/PHP memory usage?
> > I'd look at a couple of things:
> > 1) How does your MySQL server configuration match that Apache
> > configuration?  Does your httpd ever have problems connecting to MySQL?
> Only when the Out Of Memory handler kills MySQLd and it doesn't respawn,
> but usually it does. Generally mysqld seems to consume about 2% of CPU and
> very little memory, so I think the httpd/php interaction is looking more
> likely. If you can give me a few variables you're interested in from the
> mysql configuration, I can post them here for sure.
> > 2) When you look at your processes in top, does the RSS column for your
> > httpd processes show any disturbing development?
> > How big do the processes get in the 4000 connections you allow them?
> Um, OK, I'm afraid you lost me here. RSS column? I can't see one. Generally
> the server is humming along with between 2 and 5 httpd processes all eating
> up around 8-20% of the memory.
> > 3) When you filter all the 404 ("File does not exist") out of your error
> > log, are you left with any clues?
> I shall take a look at this and get back to you. Thanks for the pointers so
> far. Plenty more to explore.
> JM
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