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Date: Fri, 06 May 2005 07:47:20 -0700
From: Carl Schrader <carl@sabucat.com>
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Subject: Re: [users@httpd] One virtual server causes my whole network to come
 to a crawl

It seems to be a traffic issue actually. Apache is on it's own server. 
If I unplug the Apache server from the network, the network works 
correctly again. If I turn off the said virtual server, the same result 
happens. I use custom usage logs for each virtual server and the size of 
this particular server was about twice the size compared to the others.

I'm getting this in the error log:

[Thu May 05 11:42:29 2005] [warn] child process 1874 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1672 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1875 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1886 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1857 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1858 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:29 2005] [warn] child process 1864 still did not exit, 
sending a SIGTERM
[Thu May 05 11:42:30 2005] [notice] caught SIGTERM, shutting down
[Thu May 05 11:52:23 2005] [notice] Digest: generating secret for digest 
authentication ...
[Thu May 05 11:52:23 2005] [notice] Digest: done

This is Redhat 9.0. <hiding face> Unfortunately, I know just enough 
about Linux to get things running. I've never had to deal with an issue 
like this. So I am clueless in figuring out what kinda traffic is 
happening, etc. It FEELS like the traffic is outgoing though. If it were 
incoming traffic, the traffic would still be coming in wouldn't it? I 
mean if you go to the url in question, it currently loads the main 
website instead. So that traffic would be the same.

ANY pointers to information about tracking traffic, etc would be 
helpful. I'd like to learn from this mess.

Thank you for your understanding and time.

John Hudak wrote:
> Hi Carl:
> I can't provide a specific answer to your problems but I can ask some 
> questions that may help you muddle thorough this.  I am thinking this 
> may be a resource contention problem on your machine that ultimately 
> manifests itself as slow network traffic.  I am assuming that when you 
> are looking at network traffic the traffic is about the same on the 4 
> server version versus the 5 server version?  So, what OS are you using 
> this under?  If Linux, have you seen your process stack grow? doing a 
> lot of disk swapping?   Have you tuned the packet length processing - 
> from what I recall, Windoz is more sensitive to this than Linux.
> These are just some things to think about...perhaps they can highlight 
> an area to look more into.
> John
> 
> 
> Carl Schrader wrote:
> 
>> I have Apache 2.0 with 5 virtual servers set up. As of a couple days 
>> ago, our network has been REAL slow. Today I tracked it back to Apache 
>> and specifically this one virtual server. If I turn off this virtual 
>> server, the network comes back to normal. I've looked at the logs and 
>> don't see anything out of the ordinary.
>>
>> Where should I start to track this down?
>>
>> thanks
>>
>>
>>
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> 
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