RE: [squid-users] Issue related to using Squid 3.1 or 3.29 and accessing a site that uses a recursive DNS record. (30 seconds to bring up site)

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>Sorry if I wasn't clear.
>I will try to rephrase the logic.
>I went from the buttom up.
>curl + wget + simple ruby script = slow response.
>notice that this address is a redirection.
>I am unsure now about the dns issue that I have seen this morning.
>The main problem is not the page but the ssl.
>which takes forever...
>it might be a HTTP 1 vs 1.1 issue which is the same for wget + curl + squid.
>
>leaves the main problems as: dns and service(http 1.1.) problem rather
>then squid.

>Regards,
>Eliezer

Thanks for the reply and further clarification,

I still believe the issue I am reporting is specific to DNS and how Squid's internal DNS resolver works.

I forgot to mention if I bypass using the hostname in my test, and enter one of the resolved IP's instead of webapps.kattenlaw.com it is immediate. There is no delay in bringing the page up.

I also tried another variation while testing today, I re-compiled Squid 3.2.9 with --disable-internal-dns and it has different behavior indicating even further that the problem lies within the internal resolver Squid 3.x uses.

When 3.2.9 is compiled with --disable-internal-dns, the first time I access webapps.kattenlaw.com it only takes 15 seconds to come up instead of 30 it took while having the default 3.2.9 internal resolver functioning.

Then subsequent connection attempts to https://webapps.kattenlaw.com come up instantaneously every time after that. (Switching between different browsers using the 3.2.9 as the proxy server) Indicating the name is cached at that point and not re-queried on my 3.2.9 box. In all my reading I think I recall reading somewhere that when using external DNS resolution with squid that it can wind up ignoring TTL on records. In this case the record TTL is only 5 seconds right now, so I know it is ignoring the TTL. If I restart squid, it will take 15 seconds to resolve it the 1st time.

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Received on Tue Apr 09 2013 - 19:46:56 MDT