Send us your squid.conf and your configure options from when you built it (as well as what squid version), and I can tell you how to optimize it. I've had a lot of practice......
I've posted the squid.conf from RHEL3 at:
<http://www.ics.uci.edu/~jerenkra/caching/>
There is also the output of 'squid -v' in squid-configure.
This is just the straight RHEL3 install. I'm open to building from sources as long as someone tells me what config options and squid.conf to use. ;-)
At that URL is the proxy.xml flood test case as well. Plus, summary results from flood's analyze-relative report. (mod_mem_cache and mod_disk_cache are maxing out the network now...)
Thanks! -- justin