Re: [squid-users] squid.conf cache_mem

I could have swork Orelley had a book on Squid, but now I can't find it.

Maybe this will help in the mean-time.

http://www.squid-cache.org/related-writings.html

One bit of advice that I can offer is, learn the product for your self,
you can do a much better job once you understand how it works, than a
external consultant that has no clue as to you network.

Pete

Pete Kuczynski wrote:
>
> Something dosn't look right indeed.
> I would:
> install squid on a non production box, and print out the plain vanilla
> squid.conf file.
> Than, but the Orilley book on squid. and/or, search google for
> squid.conf, to see some examples.
> Once you have a baseline set, you can tighten it down from there.
>
> Pete
>
> > Matt Anderson wrote:
> >
> > Ok, here is my stupid question :). My production squid server was set
> > up by a contractor and I'm trying to figure out how he's got it set up
> > so if it ever breaks I can fix it or what not. I notice in the
> > squid.conf there is this statement .... something looks a little fishy
> > to me -- is this a normal statement? Thanks!
> >
> > If it's not normal will this cause problems? Is it something I should
> > change? Should I never call this contractor again ;)?
> >
> >
> > # TAG: cache_mem (bytes)
> > # NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS
> > # SIZE. IT PLACES A LIMIT ON ONE ASPECT OF SQUID'S MEMORY
> > # USAGE. SQUID USES MEMORY FOR OTHER THINGS AS WELL.
> > # YOUR PROCESS WILL PROBABLY BECOME TWICE OR THREE TIMES
> > # BIGGER THAN THE VALUE YOU PUT HERE
> > #
> > # 'cache_mem' specifies the ideal amount of memory to be used
> > # for:
> > # * In-Transit objects
> > # * Hot Objects
> > # * Negative-Cached objects
> > #
> > # Data for these objects are stored in 4 KB blocks. This
> > # parameter specifies the ideal upper limit on the total size of
> > # 4 KB blocks allocated. In-Transit objects take the highest
> > # priority.
> > #
> > # In-transit objects have priority over the others. When
> > # additional space is needed for incoming data, negative-cached
> > # and hot objects will be released. In other words, the
> > # negative-cached and hot objects will fill up any unused space
> > # not needed for in-transit objects.
> > #
> > # If circumstances require, this limit will be exceeded.
> > # Specifically, if your incoming request rate requires more than
> > # 'cache_mem' of memory to hold in-transit objects, Squid will
> > # exceed this limit to satisfy the new requests. When the load
> > # decreases, blocks will be freed until the high-water mark is
> > # reached. Thereafter, blocks will be used to store hot
> > # objects.
> > #
> > # The default is 8 Megabytes.
> > #
> > cache_mem
> > 484848484848484848484848484848484848484848484848484848484848484848484848484848484848484848484848
> > MB
> >
> > Matt Anderson
> > MCSE, CNE, CCNA, Network+
> > Network Engineer
> > Maly's Corporate Headquarters
> > (616) 956-2246
>
> --
> _______________________________________
> Pete Kuczynski
> Sr. Field Engineer
> DHL Airways Inc.
> Infrastructure Technology & Services
> (773)-462-9758
> 24/7 Helpdesk 1-800-434-5767

-- 
_______________________________________
Pete Kuczynski
Sr. Field Engineer
DHL Airways Inc.
Infrastructure Technology & Services
(773)-462-9758
24/7 Helpdesk 1-800-434-5767