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RE: DBA_SEGMENTS invalid? or slow?

From: Kline.Michael <>
Date: Fri, 9 Sep 2005 13:39:52 -0400
Message-ID: <>

I knew that, but the problem here is that it says the current bytes is 2,212,495,360. The table has an initial extent of 10M. I may have missed one extent as the only difference is the last digit. It seems this has happened to me before since the upgrade to  

What I would expect is bytes to be roughly 2GB, Truncate table drop storage, and bytes drop to 10M.  

Guess I'm going to have to run some more tests. Also, it appears it doesn't happen all the time. Hmmm, maybe it's only on partitions. I'll have to watch it closer.  

Michael Kline

Database Administration

Outside 804.261.9446

Cell 804.744.1545


-----Original Message-----
[] On Behalf Of Powell, Mark D
Sent: Friday, September 09, 2005 1:13 PM To:
Subject: RE: DBA_SEGMENTS invalid? or slow?  

The truncate command never releases the initial extent of the table or its associated indexes if any. In the future I have heard Oracle is going to support defining tables and indexes without allocating storage. But at present if the table/index exists it takes at least one extent.  

HTH -- Mark D Powell --  

[] On Behalf Of Kline.Michael
Sent: Thursday, September 08, 2005 11:43 PM To:
Subject: DBA_SEGMENTS invalid? or slow?

When I query dba_segments I get:  

owner     segment_name  partition_name segment_type  tablespace_name
header_file   header_block  bytes     blocks    extents
initial_extent next_extent min_extents max_extents pct_increase freelists freelist_groups relative_fno buffer_pool

REPADMIN T_INSTRU_LDGR T_INSTRU_LDGR_200504 TABLE PARTITION TS_LDGR_M2 71 1289 2212495360 270080 211 10485760 10485760 1 2147483645 0 1 1 71 DEFAULT   Yet, when I map the tablespace, there are no extents. We have done a truncate of the partition with a drop storage, and it shows storage.  

What's up with this?  

Database is


Michael Kline
Database Administration
SunTrust Banks, Inc.
Mail Code TOC-7505

1030 Wilmer Avenue
Richmond, Va. 23227
Tel: 804.261.9446 Net: 643.9446

Cell: 804.744.1545

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Received on Fri Sep 09 2005 - 12:47:13 CDT

Original text of this message