DB CPU Utilization – Calc Method

We have 60*60=3600 CPU Seconds to use in a particular interval for single CPU in 1 hour snap

We have 16 CPU (Num_CPUs under the Operating System Statistics of AWR) which relates to 60*60*16= 57600 CPU seconds to use in 1 hr interval.

Please do this exercise and let me know.
1. Generate database report of 1 hour during peak hour time
2. Generate database report of 1 hour during off peak hour time
Calculate the (XXXX/28800)*100 = XX.XX% of Total CPU

AWR TOP 5 Timed Event Analysis – CPU Time

http://orakhoj.blogspot.in/2011/04/awr-top-5-timed-events-cpu-time.html#.U8-PSPmSwbh

Starting in 10g Oracle records both the CPU used by the instance as well as the load on the system in v$sysmetric. This is awesome as we can see how busy the system is and how much of the CPU Oracle is responsible for:

Oracle CPU Time

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