Big RAC Benchmark Performance .......issues ........ ?

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Thu, 3 Aug 2006 11:21:35 +0530
Message-ID: <BBD944BCAC3AB4499DFBAFB1D8AF302001969314@BLRKECMSG11.ad.infosys.com>

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_at_infosys.com > 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*** -- http://www.freelists.org/webpage/oracle-l

Received on Thu Aug 03 2006 - 00:51:35 CDT