[users@httpd] Apache 2.2.3 Memory Usage

["Strader, William A." <WI...@saic.com>]

Not sure if this is the right place to be asking but I thought I would try.

OK I am running Fedora Core 6 with Apache 2.2.3 (installed via yum).  The
server has 1.5gb RAM on a Intel(R) Celeron(R) CPU 2.66GHz (2666 MHz).  What
I am running into is I am getting like 12 or more httpd processes running.
Each processing using approximately 120mb RAM.  I am running the system with
prefork.c and here is the configu statement I have for it:

<IfModule prefork.c>
StartServers       2
MinSpareServers    3
MaxSpareServers   10
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  4000
</IfModule>

I also have this line in my config:

MaxMemFree 30720

Now can anyone know me why I have so many httpd processes running at a given
time and why is each process using such a large amount of RAM.

The number of sites I am running on the server is 7 domains and 4 sub
domains so a total of 11 sites.  Any advice you can give me in helping me
possible reduce the amount of ram the system is using would greatly be
appricated.

Thanks,
 
Billy Strader
WebPool
WebPool Pager: 865-417-5622
Work: 865-425-5178
Pager: 865-417-5012

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Re: [users@httpd] Apache 2.2.3 Memory Usage

[Joshua Slive <jo...@slive.ca>]

On 11/20/06, Strader, William A. <WI...@saic.com> wrote:
> Not sure if this is the right place to be asking but I thought I would try.
>
> OK I am running Fedora Core 6 with Apache 2.2.3 (installed via yum).  The
> server has 1.5gb RAM on a Intel(R) Celeron(R) CPU 2.66GHz (2666 MHz).  What
> I am running into is I am getting like 12 or more httpd processes running.
> Each processing using approximately 120mb RAM.  I am running the system with
> prefork.c and here is the configu statement I have for it:
>
> <IfModule prefork.c>
> StartServers       2
> MinSpareServers    3
> MaxSpareServers   10
> ServerLimit      256
> MaxClients       256
> MaxRequestsPerChild  4000
> </IfModule>
>
> I also have this line in my config:
>
> MaxMemFree 30720
>
> Now can anyone know me why I have so many httpd processes running at a given
> time and why is each process using such a large amount of RAM.
>
> The number of sites I am running on the server is 7 domains and 4 sub
> domains so a total of 11 sites.  Any advice you can give me in helping me
> possible reduce the amount of ram the system is using would greatly be
> appricated.

12 httpd processes does not seem at all unusual, given that you allow
up to 10 spare (inactive) processes, plus the parent (control) process
and perhaps a piped-logger or something like that.

What is unusual here is memory requirements of 120MB per process.
This is at least 10 times what you would expect in a standard install.
 It implies that you are running some modules (mod_perl or similar)
that are gobbling up tons of RAM.  You should isolate which module is
doing that and see if you can fix it.

Joshua.

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