I have one Proliant DL380G3 2 GB/RAM - 2 processors HT. 40mb/s of web traffic.
Now, I am running my web-cache with 2 squids ( one per IP ), one squid is 512MB RAM + 6GB cache (rw), other 512MB RAM + 6GB same cache (ro). the answer is: is it better, one squid or two squids ? thanks