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Posted to users@httpd.apache.org by KLEIN Stéphane <kl...@gmail.com> on 2006/10/02 16:08:19 UTC
[users@httpd] Apache access issue on high "traffic" web site
Hello
I've high "traffic" web site. I've access issue.
I use Apache version 2 on Debian.
This is my prefork configuration :
<IfModule prefork.c>
StartServers 10
MinSpareServers 5
MaxSpareServers 10
MaxClients 250
MaxRequestsPerChild 0
</IfModule>
I've set MaxClient on 250, then I think than my Apache server can
process 250 request at same time.
This is my "top" result :
top - 15:44:50 up 86 days, 23:28, 4 users, load average: 0.29, 0.40, 0.37
Tasks: 371 total, 2 running, 368 sleeping, 1 stopped, 0 zombie
Cpu(s): 14.0% us, 17.0% sy, 0.0% ni, 68.4% id, 0.0% wa, 0.0% hi, 0.6% si
Mem: 1018404k total, 929408k used, 88996k free, 70672k buffers
Swap: 2096472k total, 2640k used, 2093832k free, 426756k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
30884 root 17 0 2488 1328 848 S 7.4 0.1 15:51.88 top
32394 root 16 0 2496 1304 844 R 7.1 0.1 0:00.27 top
15505 www-data 15 0 25956 7160 3248 S 0.6 0.7 0:00.30 apache2
7440 www-data 15 0 25984 7180 3244 S 0.6 0.7 0:00.30 apache2
10545 www-data 15 0 25984 7156 3216 S 0.6 0.7 0:00.30 apache2
6274 mysql 16 0 211m 31m 4680 S 0.3 3.1 0:15.44 mysqld
15951 root 17 0 11628 6856 2696 S 0.3 0.7 0:14.60 mtop
22421 www-data 16 0 25812 6364 2584 S 0.3 0.6 0:00.23 apache2
5541 www-data 16 0 25864 6416 2596 S 0.3 0.6 0:00.22 apache2
30711 www-data 16 0 25984 7156 3220 S 0.3 0.7 0:00.30 apache2
16657 www-data 16 0 25812 6372 2592 S 0.3 0.6 0:00.23 apache2
295 www-data 16 0 25988 7148 3228 S 0.3 0.7 0:00.24 apache2
11511 www-data 16 0 25804 6356 2584 S 0.3 0.6 0:00.25 apache2
16548 www-data 16 0 26016 7240 3300 S 0.3 0.7 0:00.27 apache2
432 www-data 16 0 25800 6360 2592 S 0.3 0.6 0:00.24 apache2
3610 www-data 16 0 25804 6352 2584 S 0.3 0.6 0:00.23 apache2
8419 www-data 16 0 25804 6356 2584 S 0.3 0.6 0:00.24 apache2
26346 www-data 16 0 25804 6356 2584 S 0.3 0.6 0:00.24 apache2
5613 www-data 16 0 25800 6352 2584 S 0.3 0.6 0:00.23 apache2
14834 www-data 16 0 25960 7116 3216 S 0.3 0.7 0:00.24 apache2
19961 www-data 16 0 25968 7272 3336 S 0.3 0.7 0:00.26 apache2
20012 www-data 16 0 26008 7164 3212 S 0.3 0.7 0:00.32 apache2
5037 www-data 15 0 25916 7148 3248 S 0.3 0.7 0:00.27 apache2
22730 www-data 16 0 25800 6352 2584 S 0.3 0.6 0:00.23 apache2
3148 www-data 16 0 25844 6360 2584 S 0.3 0.6 0:00.22 apache2
5191 www-data 16 0 25804 6436 2648 S 0.3 0.6 0:00.24 apache2
6272 www-data 16 0 25844 6368 2584 S 0.3 0.6 0:00.24 apache2
30583 www-data 16 0 25840 6456 2624 S 0.3 0.6 0:00.22 apache2
1 root 16 0 1604 524 456 S 0.0 0.1 0:22.22 init
2 root 34 19 0 0 0 S 0.0 0.0 0:00.99 ksoftirqd/0
3 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/0
4 root 10 -5 0 0 0 S 0.0 0.0 0:03.14 khelper
5 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
7 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kblockd/0
61 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 aio/0
60 root 15 0 0 0 0 S 0.0 0.0 2:24.51 kswapd0
62 root 25 0 0 0 0 S 0.0 0.0 0:00.00 jfsIO
63 root 25 0 0 0 0 S 0.0 0.0 0:00.00 jfsCommit
64 root 25 0 0 0 0 S 0.0 0.0 0:00.00 jfsSync
As you can see, I've many apache 2 process which running but number is
less than 250.
My cpu level is always around 15% and I use very few swap memory.
My network traffic is low.
I've make some test with simple html file without script and I've same issue.
All pages are fetch in one or ten minutes !
Someone are one idea about my issue ?
Thanks for your help,
Stephane
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Re: [users@httpd] Apache access issue on high "traffic" web site
Posted by KLEIN Stéphane <kl...@gmail.com>.
2006/10/2, Joshua Slive <jo...@slive.ca>:
> On 10/2/06, KLEIN Stéphane <kl...@gmail.com> wrote:
> > Hello
> >
> > I've high "traffic" web site. I've access issue.
> >
> > I use Apache version 2 on Debian.
> >
> > This is my prefork configuration :
> >
> > <IfModule prefork.c>
> > StartServers 10
> > MinSpareServers 5
> > MaxSpareServers 10
> > MaxClients 250
> > MaxRequestsPerChild 0
> > </IfModule>
> >
> > I've set MaxClient on 250, then I think than my Apache server can
> > process 250 request at same time.
> >
> > This is my "top" result :
>
>
> > As you can see, I've many apache 2 process which running but number is
> > less than 250.
> >
> > My cpu level is always around 15% and I use very few swap memory.
> >
> > My network traffic is low.
> >
> > I've make some test with simple html file without script and I've same issue.
> >
> > All pages are fetch in one or ten minutes !
> >
> > Someone are one idea about my issue ?
>
> Just because you don't see 250 processes at the top of the top display
> doesn't mean they aren't all actively serving requests. See the
> server-status handler provided by mod_status to find out what your
> processes are up to. They could be waiting on some back-end resource
> (disk, database, etc), or they could be waiting on keepalive
> connections. In the latter case, try lowering the KeepAliveTimeout in
> httpd.conf.
Thanks for your help, it was KeepAliveTimeout value ! It was 15, now I
set it on 1 second and all work fine.
Thanks for server-status tips :)
Regards,
Stephane
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Re: [users@httpd] Apache access issue on high "traffic" web site
Posted by Joshua Slive <jo...@slive.ca>.
On 10/2/06, KLEIN Stéphane <kl...@gmail.com> wrote:
> Hello
>
> I've high "traffic" web site. I've access issue.
>
> I use Apache version 2 on Debian.
>
> This is my prefork configuration :
>
> <IfModule prefork.c>
> StartServers 10
> MinSpareServers 5
> MaxSpareServers 10
> MaxClients 250
> MaxRequestsPerChild 0
> </IfModule>
>
> I've set MaxClient on 250, then I think than my Apache server can
> process 250 request at same time.
>
> This is my "top" result :
> As you can see, I've many apache 2 process which running but number is
> less than 250.
>
> My cpu level is always around 15% and I use very few swap memory.
>
> My network traffic is low.
>
> I've make some test with simple html file without script and I've same issue.
>
> All pages are fetch in one or ten minutes !
>
> Someone are one idea about my issue ?
Just because you don't see 250 processes at the top of the top display
doesn't mean they aren't all actively serving requests. See the
server-status handler provided by mod_status to find out what your
processes are up to. They could be waiting on some back-end resource
(disk, database, etc), or they could be waiting on keepalive
connections. In the latter case, try lowering the KeepAliveTimeout in
httpd.conf.
Joshua.
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