Okay, I am seeing the server response is marked "private" and 7hrs old
(25200sec).
Replacing the Cache-Control header using "max-age=1800" is not having
noticeable effect because 25200sec is already past the 1800sec limit.
What you need to do there instead is:
1) remove the config changing Cache-Control header.
2) modify the "refresh_pattern . " line to be this:
refresh_pattern . 0 20% 4320 ignore-private reload-into-ims
Your Squid should then cache the server response and treat the "private"
as if it were a "must-revalidate".
Please do that then provide a new cache.log trace for us to see how the
server handles a revalidation check.
Amos
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