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Date: Tue, 1 Jul 2008 15:35:17 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Kurt Buff <kurt.buff@gmail.com>
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Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject: Re: Configuring an older server for speed...
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> less capable whitebox. One of the big issues I've had has manifested
> itself recently - we've moved from a T1 to a DS3, and while overall
> throughput has increased dramatically, people are now complaining that
> "the Internet is slow", which I've found is all down to initial page
> load. I'm pursuing optimizing squid elsewhere, and want to focus on
> getting this box as fast as I reasonably can before sticking squid on
> it. I've got more RAM to put into it - I'd be stealing from another
> machine that's little used, but I should be able to get it to 4gb RAM.

you need only as much ram as to make squid database fit.

roughly 7-8MB/GB storage, with 5 18GB disks it's <1GB, still less if you 
allow big files to be cached