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Date: Mon, 6 Apr 2009 20:50:16 -0400
Message-ID: <1404e5910904061750n72c4b267m2450b7e3e056d560@mail.gmail.com>
From: Eric Covener <covener@gmail.com>
To: users@httpd.apache.org
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Subject: Re: [users@httpd] Apache memory hog

On Mon, Apr 6, 2009 at 7:54 PM, Sean Conner <spc@conman.org> wrote:
> It was thus said that the Great Eric Covener once stated:
>> On Fri, Apr 3, 2009 at 10:08 AM, Adrian Marsh
>> <Adrian.Marsh@ubiquisys.com> wrote:
>> > Am trying MaxMemFree 30000 =A0 =A0(30mb? - pure guess number).
>>
>> Far too large, it's per-thread. Try 1MB.
>
> =A0This triggered something I recently learned---what threading model are=
 you
> using under Apache? =A0Pre-fork? =A0Or pthreads? =A0I ask because pthread=
s will
> allocate stack space for each thread, and the amount used is the default
> mount allocated per stack per process:
>
> =A0 =A0 =A0 =A0http://boston.conman.org/2007/11/05.1
>
> =A0Rather nasty shock when I found out.

The wasted stack space doesn't shows up as a high VSZ, but not RSS.

--=20
Eric Covener
covener@gmail.com

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