Oracle 10g Statspack Report

Question

Hi....below is a snippet of statspack report
Host CPU (CPUs: 4)
~~~~~~~~ Load Average
Begin End User System Idle WIO WCPU
5.61 7.04 54.95 32.01 13.04 0.00 106.09
Instance CPU
~~~~~~~~~~~~
% of total CPU for Instance: 44.84
% of busy CPU for Instance: 51.56
I want to understand what "% of total CPU for Instance" and "% of busy CPU for Instance". When I check for vmstat on this box it gives 100% utilization.
I want to know which CPU Utilization should I refer. And whether this is good or bad? And what is the difference between vmstat and statspack report.
Can someone help me with this?
Thanks

Answer 1

9:29pm up 81 day(s), 8:41, 5 users, load average: 3.62, 3.38, 3.31My rule of thumb is that no serious CPU bottleneck exists when load averages are at or lower than number of CPUs in system.
Typically the load average is is decent surrogate for run queue depth reported by
sar -q
I suggest you enable sar data collection so you have decent system statistics available for review & analysis
Which system resource (CPU, RAM, Disk I/O, or Network) is major contributor to slow response; which is the bottleneck?
post formatted results from command below which takes 2 minutes to complete
vmstat 6 20
Edited by: sb92075 on Oct 27, 2010 7:14 PM