Oracle-L: RE: How to find avg data blocks for an index.

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Mon, 18 Feb 2002 06:28:18 -0800
Message-ID: <F001.004123C1.20020218062818@fatcity.com>

Ayyappan - What I have found useful for estimating Index size is to analyze the index and use the LEAF_BLOCKS column in USE_INDEXES. This is usually close enough for estimation purposes, and it is easy to join with other tables.

Another thought, you may want to run Don Burleson's script, http://www.dba-oracle.com/art_index1.htm, and rebuild any indexes it suggests. Some of these indexes may be taking up too many blocks, and that will throw off your estimates.
Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Monday, February 18, 2002 2:13 AM
To: Multiple recipients of list ORACLE-L

I want to estimate the size for a growing database for 2004, I want to find the avg bytes occupied by an index. how to find & calculate it.

Ayyappan.S

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Author: Ayyappan S
INET: ayyappan.subramaniyan_at_ssiworldwide.com

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Author: DENNIS WILLIAMS
INET: DWILLIAMS_at_LIFETOUCH.COM

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