Re: [squid-users] negative_ttl

From: Chris Robertson <crobertson_at_gci.net>
Date: Mon, 21 Sep 2009 17:12:44 -0800

Quin Guin wrote:
> Hi,
>
> I am seeing a behavior with the negative_ttl option and I would like to get confirmation on its behavior.
>
>
> I am using 2.7.Stable6
>
> I am having an issue with a content provider that is setting the max_age=604800 on 503 error pages and so their 503 error pages are getting cached for the length expire time.

If it's just 503's you are having trouble with...

acl HTTPStatus503 http_status 503
cache deny HTTPStatus503

...will deny caching of any response with a 503 code. Fine tune it with
an additional dstdomain acl as needed.

> I know that the content provider should correct this and I have communicated that to them several times but it gets fixed and then it gets set again..ugh!! So everyone saying SQUID has a bug or broke..
>
> I have set the "negative_ttl 0" in hopes that the negatively cached pages doesn't get cached at all not even for the default 5 min. This works for pages that don't have max_age values or very low ones.. I just want to confirm that this is the expected behavior for negative_ttl.
>
> If so I think my next course of action in the 2.7 build line is to use and acl with deny on http status values? If anyone has done this and would like to share what they did or can point me to some docs or something similar I would appreciate that.
>
>
> I know 3.1 have the ability to do what I need but I am not ready to roll that out to production yet.
>
> Thanks,
>
> Quinguin
>

Chris
Received on Tue Sep 22 2009 - 01:12:59 MDT

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