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Posted to users@httpd.apache.org by Krist van Besien <kr...@gmail.com> on 2005/07/11 10:10:46 UTC
[users@httpd] Why so many apache processes?
Hello,
On aLinux system I have an Apache, with multi threaded worker, and the
following in the conifg:
<IfModule worker.c>
StartServers 1
MaxClients 50
MinSpareThreads 5
MaxSpareThreads 50
ThreadsPerChild 5
MaxRequestsPerChild 100000
</IfModule>
Just after having started though I notive quite a few processes:
root 28544 1 5 10:09 ? 00:00:02 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28546 28544 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28547 28544 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28548 28547 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28550 28548 1 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28551 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28552 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28553 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28554 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28555 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28592 28544 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28593 28592 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28595 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28596 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28597 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28598 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28599 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
apache 28600 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
start -D SSL -D PHP4
Why is that? I would have expected only two: The main process, and one
child. The server is serving no requests, so should not be spawning
additional children.
Krist
--
krist.vanbesien@gmail.com
Solothurn, Switzerland
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Re: [users@httpd] Why so many apache processes?
Posted by Krist van Besien <kr...@gmail.com>.
On 7/11/05, Jean-Christophe Montigny <jc...@assoces.com> wrote:
> Hello,
>
> Look back at your config. It says 5 threads minimum, so at elast 6
> processes are spawned when apache is started : the main process and 5
> childs. Your config says 50 max, so at maximum there would be 50
> threads... Normally, there's another config option that states how many
> threads are started at startup (in apache 1.3 at least..) so that's why
> there is a certain number of childs that are started straight... (18 in
> your case) It's better, anyway, because in case of a peak the system
> will be ready to answer a lot of requests. If you don't want that many
> processes running, just lower your maxSparesTHreads
Threads are not processes. According to another reply Linux just shows
them as processes. The purpose of multi threaded Apache is to have
less processes, which is why seeing so many struck me as odd. But it
is clear to me now.
Krist
--
krist.vanbesien@gmail.com
Solothurn, Switzerland
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Re: [users@httpd] Why so many apache processes?
Posted by Jean-Christophe Montigny <jc...@assoces.com>.
Hello,
Look back at your config. It says 5 threads minimum, so at elast 6
processes are spawned when apache is started : the main process and 5
childs. Your config says 50 max, so at maximum there would be 50
threads... Normally, there's another config option that states how many
threads are started at startup (in apache 1.3 at least..) so that's why
there is a certain number of childs that are started straight... (18 in
your case) It's better, anyway, because in case of a peak the system
will be ready to answer a lot of requests. If you don't want that many
processes running, just lower your maxSparesTHreads
Krist van Besien a écrit :
> Hello,
>
> On aLinux system I have an Apache, with multi threaded worker, and the
> following in the conifg:
>
> <IfModule worker.c>
> StartServers 1
> MaxClients 50
> MinSpareThreads 5
> MaxSpareThreads 50
> ThreadsPerChild 5
> MaxRequestsPerChild 100000
> </IfModule>
>
> Just after having started though I notive quite a few processes:
>
>
> root 28544 1 5 10:09 ? 00:00:02 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28546 28544 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28547 28544 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28548 28547 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28550 28548 1 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28551 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28552 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28553 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28554 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28555 28548 0 10:09 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28592 28544 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28593 28592 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28595 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28596 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28597 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28598 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28599 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
> apache 28600 28593 0 10:10 ? 00:00:00 /usr/sbin/apache2 -k
> start -D SSL -D PHP4
>
>
> Why is that? I would have expected only two: The main process, and one
> child. The server is serving no requests, so should not be spawning
> additional children.
>
> Krist
>
--
Jean-Christophe Montigny
Responsable Commission Web, Association Planètes
Responsable serveurs assoces.com, Association Planètes
Etudiant de deuxième année à Grenoble Ecole de Management
Majeure Conseil en Organisation des Systèmes d'Information
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