Re: [squid-users] Object becomes STALE: refresh_pattern min and max

On Wed, Sep 24, 2008 at 05:29:52AM -0700, BUI18 wrote:
> I went through your same thinking as you described below.
>
> I checked the Expires header from the server and we do not set
> one. I checked via Fiddler web debug tool. I also verified with
> the dev guys here regarding no Expires header. I have set the min
> and max via refresh_pattern because of the absence of the Expires
> header thinking that Squid would keep it FRESH.
>
> Notice the -1 for expiration header (I do not set one on the
> object). My min age is 5 days so I'm not sure why the object
> would be released from cache in less than 2 days.
>
> If the object was released from cache, when the user tried to
> access file, Squid reports TCP_REFRESH_MISS, which to me means
> that it was found in cache but when it sends a If-Modified-Since
> request, it thinks that the file has been modified (which it was
> not as seen by the lastmod date indicated in the store.log below.

Interesting that it's caching the file for 2 days. What are the full
headers returned with the object? Any other cache control headers?

Is there any chance you have a conflicting refresh_pattern, so the
freshness rules being applied aren't the ones you're expecting? May
be worth doing some tests with very small max ages to confirm it's
matching the right rule.
Received on Wed Sep 24 2008 - 15:09:54 MDT