hugo% uptime 12:01pm up 32 days, 16:21, 14 users, load average: 0.36, 0.52, 0.47
The "load average" numbers indicate the average number of jobs in the run queue over the last 1, 5, and 15 minutes. It's arguable how useful these numbers are, but you can make some generalizations. If the load is very close to 0, then probably no one is doing anything in particular at the moment. If it's 1 or more, then the system is pretty busy since at least one job was always waiting for the cpu.
It's useful to note that these numbers are the same ones used by Clearcase when it's looking for distributed build hosts. Each of our build hosts can be configured to deny build requests if its idle percentage is below a certain level. The Clearcase bldserver.control(4) man page gives an interesting little chart giving a correspondence between reported load and idle percentage:
Load Idle Percentage 0.0 100 0.5 68 1.0 47 2.0 22 4.0 almost 0
Of course, this is all assuming single processor systems so if we had any multi-processor boxes around, things would get a little more complicated.
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