[squid-users] Caching in forward proxy mode

From: Ahmed Talha Khan <auny87_at_gmail.com>
Date: Tue, 24 Apr 2012 15:32:41 +0500

Hey All,

Does squid cache web-pages when configured in the forward interception
proxy mode i.e http_port x:y intercept.? If so how can it be turned
off.?

I actually want to bench-mark squid performance in terms of
requests-per-second that squid can support. I do not want squid to
cache the web pages on which i am doing the test. The reason is
obvious that i do not want squid to service that page from its
cache.:). I want it to get the pages from the server every time. I am
using AB(apache-benchmark) to do a comparison between request process
times when squid is inline vs when squid is not there. Looking at the
access.log file gives this for my test page.

1335266704.412 0 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.415 0 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.416 1 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.418 1 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.418 0 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.420 0 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html
1335266704.423 0 192.168.8.39 TCP_REFRESH_UNMODIFIED/200 601 GET
http://158.1.4.2/elastica.html - DIRECT/158.1.4.2 text/html

The TCP_REFRESH_UNMODIFIED request status makes me think that squid is
serving me the page from its cache and not retrieving it from its
actual source. Am i right?

-- 
Regards,
-Ahmed Talha Khan
Received on Tue Apr 24 2012 - 10:32:47 MDT

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