[squid-users] Re: Why are we getting bad percentage of hits in Squid3.3 compared with Squid2.6 ?

From: Manuel <manuelgarcia_at_trashmail.net>
Date: Sun, 27 Oct 2013 17:29:47 -0700 (PDT)

Hi Eliezer, thank you for your answer

The origin servers are the same in 2.6 and in 3.3 (in both cases Squid
connect to the same origin remote servers) and the squid.conf is exactly the
same except in the very first lines (since acl manager proto cache_object ,
etc. are obsolote).

The vast majority of the misses are TCP_MISS/200. I checked several times
the last 200 requests to the homepage of our site (the min/max age is 1
minute -but also tried with a few more minutes-) in the access.log file and
these were the results:

Squid 2.6:
1st check: 5 misses of 200 requests
2nd check: 0 misses of 200 requests
3rd check: 2 misses of 200 requests

Squid 3.3:
1st check: 59 misses of 200 requests
2nd check: 32 misses of 200 requests
3rd check: 108 misses of 200 requests

*Nothing was touched between each check, just a pause of a few seconds or
minutes.

I was think that maybe I should --enable-http-violations in Squid3.3 to get
use of override-expire ignore-reload but I think that it is already enabled
by default since negative_ttl is working properly and requires
--enable-http-violations . Indeed I reduced some misses by using
negative_ttl on squid.conf because Squid3.3 was doing misses with 404
requests while Squid2.6 was doing hits without the need of setting that
directive.

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