apache process size

Hi folks,

I'm trying to make my apache processes as small as possible, and one
thing I find lacking in optimisation guides is actual real world process
sizes.

So... how big is yours? ;)

Mine start at around 60MB, jump to 80MB when my app is initialised, and
can peak at 120MB during their lifetime. For reference I tried making
the tiniest possible one with everything stripped out, and that was
still 40MB - is this normal?

cheers
John

Re: apache process size

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On Fri, Feb 22, 2008 at 09:52:30AM +0000, John ORourke wrote:
> Hi folks,
>=20
> I'm trying to make my apache processes as small as possible, and one=20
> thing I find lacking in optimisation guides is actual real world process=
=20
> sizes.
>=20
> So... how big is yours? ;)
>=20
> Mine start at around 60MB, jump to 80MB when my app is initialised, and=
=20
> can peak at 120MB during their lifetime. For reference I tried making=20
> the tiniest possible one with everything stripped out, and that was=20
> still 40MB - is this normal?
>=20
Your question does not contain enough information. What is your basis
the 60MB, 80MB, 120MB, etc, numbers?

Regards,

-Roberto

--=20
Roberto C. S=E1nchez
http://people.connexer.com/~roberto
http://www.connexer.com

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Re: apache process size

On Fri, 2008-02-22 at 09:52 +0000, John ORourke wrote:
> Hi folks,
>
> I'm trying to make my apache processes as small as possible, and one
> thing I find lacking in optimisation guides is actual real world process
> sizes.
>
> So... how big is yours? ;)

I'm running on 32-bit linux 2.6, using apache 2.2.4, mod_perl 2.03,
running this site : http://announce.jpress.co.uk

A typical httpd process looks like this (as output by the smem.pl script
at http://www.contrib.andrew.cmu.edu/~bmaurer/memory/smem.pl )

VMSIZE: 136832 kb
RSS: 42236 kb total
25796 kb shared
64 kb private clean
16376 kb private dirty

>
> Mine start at around 60MB, jump to 80MB when my app is initialised, and
> can peak at 120MB during their lifetime. For reference I tried making
> the tiniest possible one with everything stripped out, and that was
> still 40MB - is this normal?

Depends what you're measuring - it sounds like you're including VM in
there as well.

Clint

Re: apache process size

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Roberto C. S=E1nchez wrote:
> On Fri, Feb 22, 2008 at 09:52:30AM +0000, John ORourke wrote:
> =20
>> Mine start at around 60MB, jump to 80MB when my app is initialised, an=
d=20
>> can peak at 120MB during their lifetime. For reference I tried making=
=20
>> the tiniest possible one with everything stripped out, and that was=20
>> still 40MB - is this normal?
>> =20
> Your question does not contain enough information. What is your basis
> the 60MB, 80MB, 120MB, etc, numbers?
> =20
Might be showing off my lack of unix admin knowledge here but using=20
'top', it's the value of the 'virt' column - ie. the biggest possible=20
process size if the whole thing was resident. I've been using it to=20
work out how many clients I should limit apache to, but looking at it=20
the 'res' figure never seems to get anywhere near the 'virt' figure. =20
Time to rewrite my assumptions I think!

John


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Roberto C. Sánchez wrote:

On Fri, Feb 22, 2008 at 09:52:30AM +0000, John ORourke wrote:

  

Mine start at around 60MB, jump to 80MB when my app is initialised, and 

can peak at 120MB during their lifetime.  For reference I tried making 

the tiniest possible one with everything stripped out, and that was 

still 40MB - is this normal?

    

Your question does not contain enough information.  What is your basis

the 60MB, 80MB, 120MB, etc, numbers?

  

Re: apache process size

John ORourke wrote:
> Might be showing off my lack of unix admin knowledge here but using
> 'top', it's the value of the 'virt' column - ie. the biggest possible
> process size if the whole thing was resident. I've been using it to
> work out how many clients I should limit apache to, but looking at it
> the 'res' figure never seems to get anywhere near the 'virt' figure.
> Time to rewrite my assumptions I think!

I get about 90 MB "virt" (70 MB "res") per process, running some pretty
heavy custom mod_perl templating software with some AJAX stuff that uses
(gasp) Python as a back-end via mod_python, along with DBI (DBD::Pg).

Sometimes, the load average hits 6.0, but everything always seems to
load quickly enough. :)

Linux 2.6.17.13, Debian, 2 x Pentium IV 3.0 GHz.

Colin