RE: CPU Usage % on 2-Node RAC Run versus Single Node RAC Run .... Benchmarking

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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http://www.freelists.org/webpage/oracle-l Received on Wed Sep 26 2007 - 07:41:05 CDT