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Posted to users@httpd.apache.org by David Díaz Díaz <si...@hotmail.com> on 2007/08/18 18:46:19 UTC
[users@httpd] How to change from prefork to work MPM
Hi all,
I have a question, maybe silly question, about to how can I change the MPM
on an Apache Installed, let me explain I have Apache 2.2.4 running on Fedora
Core 5 with PHP 5 and Mysql 5; I've installed the apache with default
options, "configure --enable-so", I saw that default MPM installed was
prefork, but now I want to changed it for worker MPM...
How can I do it?, I need recompile the apache "--with-mpm=worker"... I know
this list it's for apache, what is the appropiate MPM Apache that works
better with php?
regards
David
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Re: [users@httpd] Apache consuming lot of memory
Posted by Joshua Slive <jo...@slive.ca>.
On 8/22/07, solidzh <so...@gmail.com> wrote:
> 2007/8/22, Joshua Slive <jo...@slive.ca>:
> > On 8/21/07, solidzh <so...@gmail.com> wrote:
> > > 2007/8/21, Joshua Slive <jo...@slive.ca>:
> > > > On 8/20/07, Jeff Peng <je...@gmx.net> wrote:
> > > >
> > > > >
> > > > > There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
> > > > > Also after install Apache,you could strip httpd to reduce some memory usage.
> > > >
> > > > I doubt that stripping the binary is going to do any good.
> > > >
> > >
> > > Why not? I once also striped the httpd,it reduce the size from 2M to 300K.
> > > If you're running 300 httpd,this really reduce some memory.
> >
> > That's just the size of the binary on disk. It normally won't have an
> > effect on actual memory usage. And even if it does have an effect, it
> > is in a part of memory that can be shared between all the processes.
> >
>
> Sorry but why it's shared by all the processes?From my
> understanding,all processes have their own memory area for storing
> codes.
A modern OS will minimize memory usage by sharing memory between
multiple instances of the same binary wherever possible.
Joshua.
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Re: [users@httpd] Apache consuming lot of memory
Posted by solidzh <so...@gmail.com>.
2007/8/22, Joshua Slive <jo...@slive.ca>:
> On 8/21/07, solidzh <so...@gmail.com> wrote:
> > 2007/8/21, Joshua Slive <jo...@slive.ca>:
> > > On 8/20/07, Jeff Peng <je...@gmx.net> wrote:
> > >
> > > >
> > > > There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
> > > > Also after install Apache,you could strip httpd to reduce some memory usage.
> > >
> > > I doubt that stripping the binary is going to do any good.
> > >
> >
> > Why not? I once also striped the httpd,it reduce the size from 2M to 300K.
> > If you're running 300 httpd,this really reduce some memory.
>
> That's just the size of the binary on disk. It normally won't have an
> effect on actual memory usage. And even if it does have an effect, it
> is in a part of memory that can be shared between all the processes.
>
Sorry but why it's shared by all the processes?From my
understanding,all processes have their own memory area for storing
codes.
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Re: [users@httpd] Apache consuming lot of memory
Posted by Joshua Slive <jo...@slive.ca>.
On 8/21/07, solidzh <so...@gmail.com> wrote:
> 2007/8/21, Joshua Slive <jo...@slive.ca>:
> > On 8/20/07, Jeff Peng <je...@gmx.net> wrote:
> >
> > >
> > > There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
> > > Also after install Apache,you could strip httpd to reduce some memory usage.
> >
> > I doubt that stripping the binary is going to do any good.
> >
>
> Why not? I once also striped the httpd,it reduce the size from 2M to 300K.
> If you're running 300 httpd,this really reduce some memory.
That's just the size of the binary on disk. It normally won't have an
effect on actual memory usage. And even if it does have an effect, it
is in a part of memory that can be shared between all the processes.
Joshua.
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Re: [users@httpd] Apache consuming lot of memory
Posted by solidzh <so...@gmail.com>.
2007/8/21, Joshua Slive <jo...@slive.ca>:
> On 8/20/07, Jeff Peng <je...@gmx.net> wrote:
>
> >
> > There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
> > Also after install Apache,you could strip httpd to reduce some memory usage.
>
> I doubt that stripping the binary is going to do any good.
>
Why not? I once also striped the httpd,it reduce the size from 2M to 300K.
If you're running 300 httpd,this really reduce some memory.
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Re: [users@httpd] Apache consuming lot of memory
Posted by Joshua Slive <jo...@slive.ca>.
On 8/20/07, Jeff Peng <je...@gmx.net> wrote:
>
> There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
> Also after install Apache,you could strip httpd to reduce some memory usage.
I doubt that stripping the binary is going to do any good.
But yes, it is almost certainly your php app that is allocating all
that memory. You should look there before looking at th apache config.
Joshua.
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Re: [users@httpd] Apache consuming lot of memory
Posted by Jeff Peng <je...@gmx.net>.
-------- Original-Nachricht --------
> Datum: Mon, 20 Aug 2007 18:27:44 +0200
> Von: "David Díaz Díaz" <si...@hotmail.com>
> An: users@httpd.apache.org
> Betreff: [users@httpd] Apache consuming lot of memory
> Hi All,
>
> I have running Apache 2.2.4 with PHP 5.2 and Mysql 5 on Fedora 5, my
> server
> has 2GB RAM and only it runs a php runtime with flash embedded that stream
> MP3 files for 300 simultaneus users...
>
> My point is that apache is consuming about 1.80GB!!!! I feel that it's not
> correct, my prefork MPM config is...
>
> <IfModule mpm_prefork_module>
> StartServers 3
> MinSpareServers 5
> MaxSpareServers 10
> MaxClients 300
> MaxRequestsPerChild 10000
> </IfModule>
>
> Other parameters are:
>
> Timeout 30
> KeepAlive On
> MaxKeepAliveRequests 1000
> KeepAliveTimeout 3
>
> Also the CPU load is max 6% use..
>
> I've been reading differents docs, What can I do to ensure that Apache
> just
> consume the necesary memory?
>
There is almost nothing reasons on those parameters setting,but it seems your application program itself is large.
Also after install Apache,you could strip httpd to reduce some memory usage.
--
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[users@httpd] Apache consuming lot of memory
Posted by David Díaz Díaz <si...@hotmail.com>.
Hi All,
I have running Apache 2.2.4 with PHP 5.2 and Mysql 5 on Fedora 5, my server
has 2GB RAM and only it runs a php runtime with flash embedded that stream
MP3 files for 300 simultaneus users...
My point is that apache is consuming about 1.80GB!!!! I feel that it's not
correct, my prefork MPM config is...
<IfModule mpm_prefork_module>
StartServers 3
MinSpareServers 5
MaxSpareServers 10
MaxClients 300
MaxRequestsPerChild 10000
</IfModule>
Other parameters are:
Timeout 30
KeepAlive On
MaxKeepAliveRequests 1000
KeepAliveTimeout 3
Also the CPU load is max 6% use..
I've been reading differents docs, What can I do to ensure that Apache just
consume the necesary memory?
thanks in advance....
David
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Re: [users@httpd] How to change from prefork to work MPM
Posted by Vincent Bray <no...@gmail.com>.
On 18/08/07, David Díaz Díaz <si...@hotmail.com> wrote:
> I have a question, maybe silly question, about to how can I change the MPM
> on an Apache Installed, let me explain I have Apache 2.2.4 running on Fedora
> Core 5 with PHP 5 and Mysql 5; I've installed the apache with default
> options, "configure --enable-so", I saw that default MPM installed was
> prefork, but now I want to changed it for worker MPM...
>
> How can I do it?, I need recompile the apache "--with-mpm=worker"... I know
> this list it's for apache, what is the appropiate MPM Apache that works
> better with php?
> regards
Had you stuck with the RPM, you'd be able to just edit
/etc/sysconfig/httpd so switch to the /usr/sbin/httpd-worker server
binary.
However, I don't think running PHP with worker is terribly advisable
unless under controlled conditions. Aside from the oft-noted thread
safety issues in 'some' php extensions, there's also the potential
side effects of PHP crashing. There are multiple known methods for
causing mod_php to crash based on things like URL crafting. In prefork
that's not a really big deal as the parent will just spawn a new child
and carry on
but with worker you'll be taking out many requests at the same time.
This is all based on hearsay; I've never tried php and worker in
production, but they seem fine on my development box.
--
noodl