"After we contacted him, Moore took a look at the utilization rates of about 1,000 Mozilla servers. Here’s what he found: the average CPU utilization rate was 6

"After we contacted him, Moore took a look at the utilization rates of about 1,000 Mozilla servers. Here’s what he found: the average CPU utilization rate was 6 percent; memory utilization was 80 percent; network I/O utilization was 42 percent." Sounds like they are stuffing as much data as possible into RAM for performance reasons, which causes the servers to be memory-bound, and as such they have more CPU available than they need relative to the amount of RAM. I am (and I think a lot of other people are) in the same situation.