[squid-users] question about refresh_pattern

If I comment out all the 3 lines for refresh_pattern in squid.conf like
below, would squid behave with builtin defaults (min=0, percent=20%,
max=4320) you mentioned in this email thread below if it doesn't recive
expilcit caching headers??

In other words what should I do if I don't want refresh_pattern at all ?
Should I just say
refresh_pattern . 0 0% 0

or should it work for the below setting??

# to change one. The default setting is only active if none is
# used.
#
#Suggested default:
#refresh_pattern ^ftp: 1440 20% 10080
#refresh_pattern ^gopher: 1440 0% 1440
#refresh_pattern . 0 20% 4320

Awaiting for your (as usual speedy:-) ) response as we are seeing a random
behavior where the object is cached for some interval of time even though we
didn't have any expilicit headers to cache it in our production system..

Thanks
Neeli

-----Original Message-----
From: Henrik Nordstrom [mailto:hno@squid-cache.org]
Sent: Saturday, February 15, 2003 9:38 AM
To: alp
Cc: squid-users@squid-cache.org
Subject: Re: [squid-users] squid and php-sites

alp wrote:
>
> thx again, henrik.
> it is becoming clear to me (wish i had your knowledge!).

If you spend as much time with Squid as I have you probably will, if not
more..

> it is maybe only of philosophical interest: i am wondering if such a
request
> for test.php would be cached initially. i mean, if a client requests it
the
> very first time, then refresh_pattern is not used, since it is simply the
> first time. so, unless squid knows to not cache it due to missing
appropiate
> headers, it may be cached (or not???).

Again, it depends on your refresh_pattern settings.

Only if Squid sees that the response will be considered fresh for more
than 60 seconds, or if it has revalidation headers allowing revalidation
(mainly Last-Modified) will it get cached.

So refresh_pattern is used both to determine if the response should be
cached and to determine if a later request can be satisfied from the
prior cached entry.

> if i have explicit entries for refresh_patterns, but no default rule and
one
> object misses my rules. will it then be regarded as fresh or stale?

If there is no matching refresh_pattern then the builtin defaults are
used (min=0, percent=20%, max=4320)

Regards
Henrik
Received on Mon Feb 24 2003 - 10:27:30 MST