Big RAC Benchmark Performance .......issues ........ ?
- From: "VIVEK_SHARMA" <VIVEK_SHARMA@xxxxxxxxxxx>
- To: <mwf@xxxxxxxx>, <panandrao@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>, <Prashant.Dabadge@xxxxxxxxx>
- Date: Thu, 3 Aug 2006 11:21:35 +0530
Thanks indeed Mark, Ananda, Prashant, Mogens, Cheng, Nial, Folks for the
inputs.
Mark - There are 16 Disks in 4 LUNs (each LUN contains 4 Disks).
Respective Redo Logs are on an additional LUN.
Batch & OLTP Runs are done separately (NOT mixed).
Due to Time constraints it may NOT be possible to split SAME into 5
pieces as advised.
Folks
Qs1 How do we address the following waits?
Qs2 Will these supposedly cause increased CPU Usage of respective DB
Servers?
From 13 minutes Statspack snapshot :-
Top 5 Timed Events
Avg %Total
~~~~~~~~~~~~~~~~~~
wait Call
Event Waits Time (s)
(ms) Time
----------------------------------------- ------------ -----------
------ ------
gc current multi block request 71,134 36
1 32.0
gc buffer busy 1,446 20
14 17.3
gc current block busy 923 14
15 12.5
gc current grant busy 4,371 7
2 6.4
gc cr multi block request 51,490 7
0 5.9
-------------------------------------------------------------
NOTE - Above Statspack corresponds to a Transactions' Run taken without
the Transactions<->Node<->data partition grouping i.e. Transactions are
being directed at random to the 4 nodes & hence transactions on
different nodes would be accessing the Same Table partitions & hence
data BLOCKS.
Next we intend to group the Transactions so that they do NOT access the
same Table partition from the different nodes.
Will provide any info needed, directly.
Thanks indeed
On 8/1/06, <VIVEK_SHARMA@xxxxxxxxxxx > wrote:
A 4-node RAC BIG benchmark with Oracle 10g / AIX 5.3L using a Hybrid
Banking App. is underway.
...
...
Config:-
APP & DB machines - P5 series
Application Hybrid - (OLTP + Batch nature of Trans).
Oracle 10.2
AIX 5.3
Filesystem GPFS
Storage Box DS8300
Hardware RAID 1+0
Underlying Hardware Stripe Unit Size 64 KB (S.A.M.E.)
**************** CAUTION - Disclaimer *****************
This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely
for the use of the addressee(s). If you are not the intended recipient, please
notify the sender by e-mail and delete the original message. Further, you are
not to copy, disclose, or distribute this e-mail or its contents to any other
person and any such actions are unlawful. This e-mail may contain viruses.
Infosys has taken every reasonable precaution to minimize this risk, but is not
liable for any damage you may sustain as a result of any virus in this e-mail.
You should carry out your own virus checks before opening the e-mail or
attachment. Infosys reserves the right to monitor and review the content of all
messages sent to or from this e-mail address. Messages sent to or from this
e-mail address may be stored on the Infosys e-mail system.
***INFOSYS******** End of Disclaimer ********INFOSYS***
Other related posts: