Maybe
if I post some more about the conf files.
Of
most interest will be ssl.conf, and the /svn location.
Arnab,
my experience with Apaches fairly limited, and despite me reading on those
parameters before, I’m not sure of the appropriate settings to use. I
know enough to be dangerous and do some debug, but not enough about each
setting to understand what they do in detail.
Maybe
if I lowered MaxRequestsPerChild, would the large sub-processes close down?
Would they hand back the memory they’ve used? (httpd doesn’t seem
to on a stop/start).
I don’t
have MaxMemFree in my config anywhere. I think I’ll try this one first.
Adrian
From: Arnab Ganguly
[mailto:aganguly01@xxxxxxxxx]
Sent: 03 April 2009 14:40
To: users@xxxxxxxxxxxxxxxx
Subject: Re: Apache
memory hog
Did you tried with
MaxRequestsPerChild and MaxMemFree directives?
Thanks
-A
On Fri, Apr 3, 2009 at 6:56 PM, Adrian Marsh
<Adrian.Marsh@xxxxxxxxxxxxx>
wrote:
Hi Christian,
Do you think you could ask them to see if they resolved it?
I had similar thoughts, so in my VMware copy I tried various things, including
working without SSL, but I didn't see the results get any better.
Adrian
Subject: AW:
Apache memory hog
Hello.
A client of our company has similar issues. They run SLES 10 with apache 2.2.x
and the newest subversion 1.5.x and also use https. For authentication they use
winbind and not ldap.
They too have the problem, that the apache processes take up a lot of cpu
cycles and use up the ram to the point, where the processes crash with out ouf
memory. After that the memory is not freed. Even when the httpd processes are
stopped (and not crash) the memory is not freed.
I do not know the fine details here, bit the sysadmin found some odd things
going on with ssl.
-----Ursprüngliche Nachricht-----
Von: Tom Evans [mailto:tevans.uk@xxxxxxxxxxxxxx]
Gesendet: Freitag, 3. April 2009 15:16
An: users@xxxxxxxxxxxxxxxx
Cc: aw@xxxxxxxxxx
Betreff: RE: Apache memory hog
On Fri, 2009-04-03 at 13:58 +0100, Adrian Marsh
wrote:
> Hi Andre,
>
> Thanks for the reply. No its definitely the httpd process. I see
each thread consuming hundreds of megs of RES memory being used in TOP. I
just restarted it and already each is consuming:
>
> 10006 apache 15 0 279m 15m 3160 S
0.0 0.1 0:00.29 httpd
> 10004 apache 15 0 278m 13m 3400 S
0.0 0.1 0:00.05 httpd
> 10007 apache 15 0 278m 13m 3048 S
0.0 0.1 0:00.04 httpd
> 10001 apache 15 0 277m 13m 3456 S
0.0 0.1 0:00.08 httpd
> 10003 apache 15 0 277m 13m 2976 S
0.0 0.1 0:00.10 httpd
> 10002 apache 15 0 277m 13m 3112 S
0.0 0.1 0:00.07 httpd
> 10005 apache 15 0 277m 13m 3080 S
0.0 0.1 0:00.06 httpd
> 10000 apache 15 0 277m 12m 3432 S
0.0 0.1 0:00.51 httpd
>
> Also, I forgot to mention its 1.5.5 of SVN (1.5.2 had a mod_ bugfix for a
memory leak).
>
> What interests me at the moment is diagnosing which module it is (as
others running 1.5.5 don't report this issue). It's a fairly vanilla
httpd setup other than the svn config.
>
> Adrian
>
Doesnt look that bad. That 27[789]m reported as SIZE is shared between the
processes, shared pages and the like, and the RES isn't excessive in my
opinion. What does mod_status and mod_server_info say is going on when you
notice the memory starvation?
What precisely did you change with your yum update? Did that change core
packages, like libc etc?
Cheers
Tom
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