Hi all,

Pound logs a time in its logs:

Oct 18 23:00:38 proxy1 pound: cdn.boeties.nl 85.223.47.166 - - 
[18/Oct/2011:23:00:38 +0200] "GET /mwa/image/productlijst/2902F.jpg HTTP/1.1" 
200 13283 "http://www.boeties.nl/webshop/boeties"; "Mozilla/5.0 (Linux; U; 
Android 2.3.3; nl-nl; HTC_DesireZ_A7272 Build/GRI40) AppleWebKit/533.1 (KHTML, 
like Gecko) Version/4.0 Mobile Safari/533.1" (ADN Default -> 
213.207.111.2:8080) 0.025 sec

This time: 0.0.25 sec, what time is measured?

I'm asking this question, because we're having a hard to debug problem: 
sometimes a request takes 4 to 6 seconds for the end user to complete. Pound 
however still logs a very short time. Therefore I suspect the delay can be 
found in the final stage of sending back the response body from pound to the 
visitor.

Some noticeable behaviours:

* the connections is either very quick, or delayed by 4 to 6 seconds
* according to firebug, most time is spent waiting, the result arrives in very 
short time
* delays are clustered together: sometimes about 4 images are delayed while 
others arrive quickly. The delay on those 4 images is always the same for all 
of them (again, measured by firebug).

Our setup:

    visitors
       |
     pound 
    |     |
nginx     nginx
  |         |       
apache    apache

pound load balances between multiple nginx caches and has the apache machines 
configured as HAport.

-- 
Met vriendelijke groet,


Erik Hensema
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