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RE: SAP Reorgs

From: <>
Date: Mon, 14 Jun 2004 08:45:29 +0100
Message-ID: <>

No-one says a re-org will never help, just that you need to identify areas which might benefit from it.

Blindly re-org tables and rebuilding indexes is a waste of time unless you are sure it needs to be done

-----Original Message-----

[] On Behalf Of Vergara, Michael (TEM)
Sent: 14 June 2004 05:32
Subject: RE: SAP Reorgs


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 We archive data on a active schedule, and reorging the tables/tablespaces that have just been archived brings down the tablespace size, rebuilds the indexes for improved performance, and allows us better management of our disk space.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.


-----Original Message-----

From: Dan Hotka [] Sent: Sunday, June 13, 2004 7:04 AM
Subject: SAP Reorgs


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

Thank you in advance.

Dan Hotka

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Received on Mon Jun 14 2004 - 02:38:23 CDT

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