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Home -> Community -> Mailing Lists -> Oracle-L -> RE: SAP Reorgs
Dan:
I am surprised at the responses you are receiving about doing Reorgs. Everyone seems to think it's dumb and unnecessary.
We use SAP here at Guidant. It's our 900-lb gorilla application. As goes SAP, so goes most if not all of the other systems and databases.
We reorg regularly. We see a palpable return on several levels from performing this activity. We archive data on a active schedule, and reorging the tables/tablespaces that have just been archived brings down the tablespace size, rebuilds the indexes for improved performance, and allows us better management of our disk space.
It is for performance and savings that we reorg. We do not need to buy as much disk every year, and the performance remains acceptable to the users. I know...everybody says disk is cheap; try telling my manglement when we submit a purchase req for more EMC disk. Cheap? Not from our budget!
With that off my chest, we use Quest Live Reorg to perform our reorgs. Basically, LR does a CTAS, and then mines the redo logs to keep the current table and the reorged table in sync until 'cutover', which is when the new table becomes the main table and the former main table becomes baggage. We cutover late on Saturday night, when we can safely take SAP down without impacting too many users - Quest claims to the contrary, SAP does notice (and complains bitterly) when the cutover happens if you try it with SAP up. But cutover only takes minutes, and we've not yet (hear the sound of me knocking on wood, crossing myself, and lighting a candle) had an issue with the cutover that was not recoverable.
Cheers,
Mike
-----Original Message-----
From: Dan Hotka [mailto:dhotka_at_earthlink.net]
Sent: Sunday, June 13, 2004 7:04 AM
To: oracle-l_at_freelists.org
Subject: SAP Reorgs
Hi,
I have a gig where they have a rather large SAP database...they want to reorg it...then periodically reorg it. I'll find out this next week all the specifics.
I am wondering if anyone has any experience in doing reorgs on SAP databases. What I should look for...what I should look out for...SAP specific things...which objects needs periodic reorgs...which objects needs a better storage parameters... Any help/comments would be most appreciated.
Thank you in advance.
Dan Hotka
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.htmlReceived on Sun Jun 13 2004 - 23:28:27 CDT
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