Squid proxy slow to serve up HTML pages
I am running SLES10 with Squid 2.6Stable3 and DansGuardian220.127.116.11. My hardware is a Dell PowerEdge1750, XEON Dual Core 2.8GHz, 1GB Ram, 68GB RAID5 SCSI. All is configured and working correctly.
My issue is many sites populate slower than a client that is not using the proxy. By slower I mean several seconds. Now I realize this is not much but I'm wondering what I can do to maximize performance. I have tired removing DansGuardian from the configuration, setting ulimit = 8192 in my rcsquid script (and reconfigured after setting this ulimit), setting cache_dir = aufs /usr/local/squid/var/cache 1000 16 256, setting cache_dir = null - but don't see any noticeable affect from these.
My current config is --enable-basic-auth-helpers=PAM --enable-async-io --enable-storeio=ufs,aufs,null.
I have CacheMgr working and am also using SARG.
I'm looking for any help in tuning my Squid proxy and/or OS to maximize performance.
I have tried to run WebPolygraph against my Squid but I'm not getting polygraph to run correctly. Can someone suggest another method to use to test my configuration?