"gc current block busy" wait in Concurrent BATCH Processes Run

Folks

In a Benchmark Run, 256 concurrent BATCH Processes on RAC using Dedicated Sessions (NON-MTS) showing the following Waits:-

How is the "gc current block busy" wait to be addressed? From the Statspack Report (Level 7) which section gives the Objects which is incurring this wait? Is it the "Segments By Current Blocks Received" section OR the "Segments by CR Blocks Received" section?

Will share the Statspack Report, as needed.

Config:-
Oracle 10.2.0.3 on 3 Node RAC
Solaris 10

Cheers

Vivek

Statspack Report's Time Elapsed: 11.97 (mins)

Top 5 Timed Events                                                 Avg    %Total

~~~~~~~~~~~~~~~~~~                                                 wait    Call

Event                                     Waits        Time (s)    (ms)    Time



----------------------------------------- ------------ ----------- ------ ------


CPU time                                                 5,854             57.6

gc current block busy                     24,910         1,463      59     14.4

SQL*Net break/reset to client          1,075,218         1,285       1     12.6

gcs log flush sync                       103,520           511       5      5.0

gc buffer busy                             6,489           367      57      3.6



-------------------------------------------------------------

Host CPU (CPUs: 120)

~~~~~~~~ Load Average

Begin End User System Idle WIO WCPU

• ------- ------- ------- ------- ------- --------

8.58 9.54

          8.26 15.61 76.13 0.00 1.19

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