[squid-users] RELEASE/304 messages in store.log

Hi,

We recently added the "reload-into-ims" directive to our squid config
after noticing that a large number of queries were coming in with No-
Cache set, killing our cache efficiency. We have a relatively short
max-age set, working on the assumption that the If-Modified-Since will
keep the unchanging content from being continually refreshed.

Looking in our store.log, however, we're seeing lots of this:

1204650204.462 RELEASE -1 FFFFFFFF 2435DD617A6A5750936E71A36D77AF8F
304 1204635071 1204057533 -1 image/jpeg -1/0 GET http://example.com/object.jpg

I'm unsure if the meaning of this. The "RELEASE" line suggests that
the object in question was deleted from the cache store, but the 304
suggests that a 304 Not-Modified was sent to the client.

Any insights? I can't imagine that the object should be purged from
cache if a Not-Modified is returned, but I can't tell if it actually
is or not...

-C
Received on Tue Mar 04 2008 - 10:07:27 MST