[K12OSN] OT apache troubleshoot

[Todd Hackett]

Hi Barry

   PID     USER     PR  NI   VIRT   RES   SHR S  %cpu %Mem Time+ COMMAND
2789 daemon    30  10  261m  12m   3428 S  0.0  0.3    0:01.77httpd
  2923 daemon    30  10  258m 9120  3440 S  0.0  0.2   0:00.97 httpd
  3106 daemon    30  10  258m 9048  3396 S  0.0  0.2   0:01.15 httpd
  3501 daemon    30  10  258m 8992  3328 S  0.0  0.2   0:00.57 httpd
  3891 daemon    30  10  258m 9036  3388 S  0.0  0.2   0:00.79 httpd
  3930 daemon    30  10  258m 8764  3132 S  0.0  0.2   0:00.05 httpd
  4021 daemon    30  10  257m 8764  3328 S  0.0  0.2   0:00.28 httpd
  4717 daemon    30  10  257m 8704  3312 S  0.0  0.2   0:01.01 httpd
  4719 daemon    30  10  258m 9012  3364 S  0.0  0.2   0:00.89 httpd
  4726 daemon    30  10  258m 8372  3028 S  0.0  0.2   0:00.01 httpd

uptime is 965 days

The above is a production server with many websites ...  Are you sure it 
is 25% and not 0.2 or 0.3%?      You can limit the number of processes 
to spawn; on my test server at home .. I typically use 2 to 4 
depending.  If it is a BIG memory concern, drop that to 1 or 2 and see 
how it goes.  I have seen up to 25 children running at busy times and it 
doesn't seem to slow things down.  ( dual 64Bit 3.6Gig Xeon's 
hyper-threading; with 8Gig of memory, scsi raid )

You didn't mention your server:  Memory, Disk system; and the apache 
version.

todh



On 03/16/2013 05:31 AM, Barry R Cisna wrote:
> Hello All,
>
> # off topic
>
> FYI. I did search the Apache forums and couldn't really find a definite
> solution.
>
> On my home CentOS 6.x / K12Linux server I do run Apache server with
> about 6 sites running for various people I know that they maintain
> simply as a hobby type thing for themselves. I run Joomla as the CMS for
> convenience which has worked very well since the get-go.
>
> Problem:
> Without having done any updates to the server for sometime and no
> monkeying around with configuration files on the Apache part anyway.
> Some times now when running top I seen many instances of http in the mix
> and each process about 25% memory,,,which of course does make the server
> itself get eventually slow.
>
> This is about an 4 month old brand new medium grade hardware,but nothing
> 'enterprise grade" FWIW.
>
> In the past I always did see about 10-12 instances of httpd running when
> I run ' ps aux|grep httpd' but never have seen 6-8 instances running
> when I run top.
> I guess due to the fact I have never seen this in top before,(and
> consequently the server getting somewhat slow),I have never really
> looked into this or have read up any on the http 'forking process'.
>
> If I simply shut off the httpd service for 10 mins then restart
> later,,these of course disappear. I am not sure what to think in regards
> to troubleshooting and tracing what causes this behaviour. All 6
> websites have run (on my previous server hardware) and I never did have
> this happen.
> Sorry for the long post
>
> Thank You,
> Barry
>
>
>
>
>
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-- 
Todd Hackett    	System Administrator
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Libby, Montana 59923	406.293.3843

http://www.todhackett.com

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