We are running Squid 3.1 on Debian Squeeze. We are using squid as a reverse proxy/cache for a Django backend. The cache is working well, but there is one file that keeps getting by. It has a "?" in its URL, which is needed because it has a license key parameter in it. I put a refresh pattern to try to catch it, but it is not cached in a consistent manner. It returns a HIT maybe 50% of the time, sometimes requests seconds apart will show different results. Here is the refresh pattern that I was hoping would catch it, this is above any other patterns (this is a static file, and we want squid to cache it for at least an hour): refresh_pattern -i http://foo.bar/static/floatbox/options.js? 60 100% 60 override-expire override-lastmod Here are some logs showing the weird caching: 62.189.22.21 [31/Oct/2012:06:15:29 -0700] "GET http://foo.bar/static/floatbox/options.js? HTTP/1.1" 200 TCP_MEM_HIT:NONE 208.101.141.24 [31/Oct/2012:06:15:55 -0700] "GET http://foo.bar/static/floatbox/options.js? HTTP/1.1" 200 TCP_MISS:FIRST_UP_PARENT I was hoping it was a staleness issue, and setting the override-expire and lastmod options would help enforce the min/max in the refresh pattern. I'm sure I have missed something. Thanks in advance for any help. - Michael Penetcost
