Oracle-L: RE: Extent allocation for objects

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Mon, 19 May 2003 13:06:43 -0800
Message-ID: <F001.0059D035.20030519130643@fatcity.com>

Rick - When you MOVEed the table, you probably didn't alter any storage parameters, so Oracle probably kept the storage parameters from Tablespace A. My guess is that if you tried it again, altering the storage parameters, you'd see the result you were expecting.

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

-----Original Message-----
Sent: Monday, May 19, 2003 3:42 PM
To: Multiple recipients of list ORACLE-L

Let me give you the scenarios. Maybe I can get a good explanation from someone.

Tablespace A locally managed uniform extents size 512M.

Tablespace B locally managed uniforma extents size 1M.

Create table TabA tablespace A. Insert data, and it has 1 extent of 512M even though the table size is only 76M. This makes sense.
Create table TabA tablespace B. Insert data, and it has 76 extents of 1M each. This makes sense.
Create table TabA tablespace A. Same as scenario 1. Alter table TabA move tablespace B. Creates 512 extents of 1M each. Why?

The table only needs 76M of space. Why create all those additional extents?

Thanks for any information,

Rick Stephenson

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Author: DENNIS WILLIAMS
INET: DWILLIAMS_at_LIFETOUCH.COM

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