Giving your system a performance checkup

Analyzing CPU Usage

Three kind of useful CPU data:

overall utilization

load averages

per-process CPU consumption

How to get these information?

(1) overall utilization
% sar -u 5 3

        13:33:40               %usr           %sys         %wio           %idle
        13:33:45                  4                58              27                11
        13:33:50                  7                83               9                   0
        13:33:55                  9                77              13                  0
       Average                   7                 73              16                  4