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List:       sidewinder
Subject:    [Sidewinder] Sidewinder 7.x HTTP Performance
From:       Sidewinder moderated discussion list <sidewinder () adeptech ! com>
Date:       2009-04-30 18:51:00
Message-ID: 49F9F314.8010503 () spawar ! navy ! mil
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We are running Sidewinder 7.01.02 and our HTTP performance is very 
sluggish.  We tried moving the rule to the top of the list and even 
tried a generic proxy.

Generally, the page will not load or load only a small portion during 
the initial access attempt.  The user can then refresh the page and the 
contents will usually appear just fine.

Sniffing seems to indicate that the initial request is being sent and 
information is NOT being returned.  However like mentioned above, a 
refresh causes the communications to function as expected.  Once a site 
is loaded, other pages on the same system seem to load just fine.  We 
were monitoring the actual HTTP traffic AFTER DNS resolution, so DNS is 
not the issue.

I really don't understand what could be causing the problem.  It doesn't 
appear to be DNS or the HTTP filtering.  The initial HTTP packet gets to 
the internal interface and leaves the external interface within 1 
hundredths of a second.  Once a site has been visited, it works well. 
It is just on the initial visit to a site that the packets exit and 
often seem to delay in the response or fail all together.

Any ideas on what the problem could be or another test that could be run 
to identify the issue?

-- 
-
- Bryan Swann (swann@spawar.navy.mil)  843/218-4749
- SPAWAR Systems Center Charleston
-
-  Deja Moo: The feeling that you've heard this bull before.


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