Hi:
I like to ask a few question regarding the "top"
command. Suppossing I am monitoring the performance of 2
programs namely "trigger" and "db_server" running on a
single processor machine, and using top command gives me
the following output (Some imptertinent stuff removed).
load average : 0.55, 0.51, 0.47
Cpu(s) : 13.6%us
PID %CPU COMMAND
2768 24 db_server
2773 12 trigger
1) How is 13.6% related to 24% and 12%? Is the actual CPU
utilization of db_server equal to 24% x 13.6%? How do I
interpret the %CPU column(sometime there are entries in the
CPU column that exceed 100%)
2) How do I interpret the load average entry found in the
upper right side of a top output?
3) Is vmstat a better tool (i.e. more accurate) as opposed
to top for monitoring overall performance ?
Thank you very much,
ludwig.
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