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RE: select data using trigger

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Wed, 12 Dec 2001 14:06:33 -0800
Message-ID: <F001.003DB487.20011212135533@fatcity.com>

Kevin Loney, the noted Oracle author recently presented some studies he did on this issue at our TCOUG meeting. In a nutshell, his results were:

My apologies to Kevin if I have misrepresented his findings. He presented much more analysis and I really appreciated his work. I look forward to their inclusion in a future book.
Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Tuesday, December 11, 2001 9:25 AM To: Multiple recipients of list ORACLE-L

Well ...

According to a document on Metalink .. it is pretty safe to assume the cost of a DML action on an index as 3 times of that of on the table. So, if inserting one record costs you one unit, on your table with 15 indexes it would be

(1 * 1 table) + (3 * 15 indexes) = 46 units.

And this is for each row ...

HTH
Raj



Rajendra Jamadagni MIS, ESPN Inc. Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

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Author: DENNIS WILLIAMS
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Received on Wed Dec 12 2001 - 16:06:33 CST

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