RE: How do I find out the size of a index

From: <Alexander.Feinstein_at_mitchell1.com>
Date: Wed, 13 Aug 2003 18:19:23 -0800
Message-ID: <F001.005CA8B4.20030813181923@fatcity.com>

You can also do:

analyze index <INDEX_NAME> validate structure; select blocks, lf_blks, br_blks, btree_space, used_space from index_stats;

Alex.

-----Original Message-----
Sent: Wednesday, August 13, 2003 10:39 AM To: Multiple recipients of list ORACLE-L

Roger - What do you mean by size? The allocation on disk, or the actual number of blocks the index is using? Years ago when I was trying to get the actual number of blocks an index was using (to predict when an index was going to outgrow its extent), I used the LEAF_BLOCKS of the USER_INDEXES table (after analyze, as Tanel points out. Theoretically this is slightly under the total, but it was the closest I was able to find.

Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
Sent: Wednesday, August 13, 2003 11:54 AM To: Multiple recipients of list ORACLE-L

Hi,

I can use "select blocks*8 from dba_tables where table_name='ABC'" to find out the size of a table. How do I find out the size of a index? I do not see a column BLOCK in dba_indexes.

Thanks,

Roger Xu
Database Administrator
Dr Pepper Bottling Company of Texas
(972)721-8337

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Author: Roger Xu
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  INET: Alexander.Feinstein_at_mitchell1.com

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