Re: [users@httpd] performance problem in one virtual host

[wglass <wg...@gmail.com>]

Just a quick followup on this message.  I think Nick's theory on DNS was
right.  I talked to my ISP provider, and they do a DNS lookup in the switch
for every web request.  So, even though the server and client weren't doing
DNS lookups, the intermediate network was.  And the symptoms of the problem
were certainly reminiscent of sporadic DNS failures.  We've reconfigured the
DNS for the server and the problem hasn't reoccurred - I'm hoping this takes
care of it.

A belated thanks, Nick! for the help.

WILL


wglass wrote:
> 
> Hi Nick,
> 
> I'm puzzled by the client DNS theory, since I had the host (in Windows,
> mind you) directly mapped in /etc/hosts.  (the Windows equivalent).
> 
> The argument in favor of the DNS theory is that we ran a web test of DNS
> with www.dnsreports.com and it reported several problems.  (we were using
> two vendors and they had inconsistent serial numbers).
> 
> New idea-- could DNS issues be causing cache performance problems at the
> ISP?  (I'm accessing via a Comcast cable modem).  Anyone have experience
> with this type of issue?
> 
> WILL
> 
> 
> 
> Nick Kew wrote:
>> 
>> On Fri, 31 Aug 2007 06:46:37 -0700 (PDT)
>> wglass <wg...@gmail.com> wrote:
>> 
>>> 
>>> Thanks, Nick.
>>> 
>>> Can you explain your question about DNS?
>> 
>> If it's one vhost, that suggests the possibility of an issue
>> with DNS lookups at the client end.
>> 
>>> What's the easiest way to get and test an HTTP/1.0 client?
>> 
>> I usually use lynx for it.
>> 
>> -- 
>> Nick Kew
>> 
>> Application Development with Apache - the Apache Modules Book
>> http://www.apachetutor.org/
>> 
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> 
> 

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