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From wglass <wglasshus...@gmail.com>
Subject Re: [users@httpd] performance problem in one virtual host
Date Fri, 31 Aug 2007 13:46:37 GMT

Thanks, Nick.

Can you explain your question about DNS?  My assumption is that if I had a
reverse DNS issue, I could identify it by running tcpdump on port 53 on the
server.  (e.g. with HostnameLookup) I did this and saw no TCP/UDP traffic. 
To eliminate the possibility of client DNS issues, I hardcoded the IP
address to the domain name in /etc/hosts on the client.  Is there something
I'm missing here?

The files are accessed directly on the same hard drive by httpd, though they
are also made available via NFS and SMB to other systems.

What's the easiest way to get and test an HTTP/1.0 client?

WILL


Nick Kew wrote:
> 
> On Fri, 31 Aug 2007 02:23:38 -0700 (PDT)
> wglass <wglasshusain@gmail.com> wrote:
> 
>> * I suspected DNS/reverse DNS issues.  But I ran a tcpdump on port 53
>> and saw no signs of DNS queries
> 
> It does look an obvious candidate.  And why would DNS be generating
> traffic (let alone TCP traffic) on the server?
> 
> The other quick check I'd run is to see if an HTTP/1.0 client
> suffers the same delays.  But it would be bizarre indeed for that
> to happen as you describe, with one vhost and static files.
> 
> Talking of which, are that vhost's files mounted on anything exotic
> or non-local?
> 
> -- 
> Nick Kew
> 
> Application Development with Apache - the Apache Modules Book
> http://www.apachetutor.org/
> 
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