RE: CPU Usage % on 2-Node RAC Run versus Single Node RAC Run .... Benchmarking
- From: VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx>
- To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 26 Sep 2007 18:11:05 +0530
Folks
CASE 1 - When Executing a FULL Set of Transactions on Node 1, with the 2nd
Node's RAC instance in SHUTDOWN Condition
CPU Usage of Node 1-ASMDBR1 = 20 %
CPU Usage of Node 2-ASMDBR2 = 0 %
CASE 2 - When Executing a FULL Set of Transactions on Node 1(ASMDBR1 instance),
with the 2nd Node's RAC instance ASMDBR2 Simply UP & NO Application
transactions Fired to it
CPU Usage of Node 1-ASMDBR1 = 20 %
CPU Usage of Unused Node 2-ASMDBR2 = 26 %
ASMDBR2 - UNUSED Node:-
Qs How can the following Waits be Reduced?
Top 5 Timed Events Avg %Total
~~~~~~~~~~~~~~~~~~ wait Call
Event Waits Time (s) (ms) Time
----------------------------------------- ------------ ----------- ------ ------
CPU time 2 29.3
control file sequential read 1,746 2 1 23.8
reliable message 5 1 269 20.8
control file parallel write 104 0 3 5.3
name-service call wait 3 0 96 4.4
-------------------------------------------------------------
CASE 3 - When Executing approx Half the above Number of Transactions on Node 1,
& the Other Half on Node 2 (by setting LOAD_BALANCE = yes in tnsnames.ora)
CPU Usage of Node 1 = 18 %
CPU Usage of Node 2 = 19 %
Will Share Statspack Reports, if asked for.
Cheers & Thanks
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