I am running Squid on a 4-processor machine. When looking at the Squid statistics I noticed the following: CPU Usage: 24.20% CPU Usage, 5 minute avg: 77.07% CPU Usage, 60 minute avg: 74.61% I've never seen the first number go above 25%, so it seems that it takes all four processors in account for calculating the usage. However, the last two seem to use single-processor CPU statistics. Joost