[squid-users] stale pages remain in cache

Our squid reverse cache server is not removing random stale pages from its
cache. Some files it properly removes, but it will randomly serve files
that should have expired. I haven't been able to determine a pattern to
what files it keeps and which files it excludes.

Here's a snippet of the header that squid is sending with the request:

Date: Wed, 06 Mar 2002 10:25:57 GMT
Content-Type: text/html
Cache-Control: public
Expires: Wed, 6-Mar-2002 10:30:57 GMT
Age: 66146
X-Cache: HIT from www.opensecrets.org

This page should have expired an hour prior to this request.

Our refresh patterns are:
refresh_pattern -i \.asp 720 20% 720
override-expire
refresh_pattern . 720 20% 1440 override-expire

Version: 2.4-Stable3 (rebuilt from RedHat's latest RPM package), using diskd.

The store.log file shows the page being swapped out, and the access.log
file shows a TCP_HIT for the request.

I thought that it might have been a problem with the refresh_pattern(s) but
I've seen at least one page stay in the cache for 3 weeks.

Thanks,
-Ryan Casey
Received on Thu Mar 14 2002 - 08:50:32 MST