Comments on: How to drop and recreate Oracle undo tablespace and its data files http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/ Business in Information Technology & Biotechnology Mon, 30 Jan 2012 16:06:06 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Jibran http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-458 Jibran Fri, 16 Jul 2010 14:35:52 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-458 Thank you for such a great solution! I have searched a lot and none of the URL works, but your works like magic. thanks Thank you for such a great solution!

I have searched a lot and none of the URL works, but your works like magic.

thanks

]]> By: john http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-427 john Fri, 29 May 2009 09:07:10 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-427 did this on 10gR2. had to open the database before dropping the rollback segments. --Awesome post-- did this on 10gR2.
had to open the database before dropping the rollback segments.

–Awesome post–

]]> By: Daniel Morgan http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-403 Daniel Morgan Thu, 19 Feb 2009 23:51:02 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-403 Tried this with 11gR1 and it failed as is but the following elements did work as shown: SQL> create pfile from spfile; SQL> shutdown abort -- edit pfile and add _corrupted_rollback_segments=('_SYSSMU1_1222867085$') SQL> create spfile from pfile SQL> startup SQL> drop rollback segment "_SYSSMU1_1222867085$"; In my case SHUTDOWN IMMEDIATE failed ... an abort was required. And STARTUP RESTRICT MOUNT failed as well. In a MOUNT status it would not, and I would think should not, allow a change to an unopened database. Tried this with 11gR1 and it failed as is but the following elements did work as shown:

SQL> create pfile from spfile;

SQL> shutdown abort

– edit pfile and add
_corrupted_rollback_segments=(‘_SYSSMU1_1222867085$’)

SQL> create spfile from pfile

SQL> startup

SQL> drop rollback segment “_SYSSMU1_1222867085$”;

In my case SHUTDOWN IMMEDIATE failed … an abort was required. And STARTUP RESTRICT MOUNT failed as well. In a MOUNT status it would not, and I would think should not, allow a change to an unopened database.

]]> By: UNSUPPORTED DATABASE http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-388 UNSUPPORTED DATABASE Wed, 07 Jan 2009 12:36:18 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-388 If you use _offline_rollback_segments your database will be unsupported by Oracle! If you use _offline_rollback_segments your database will be unsupported by Oracle!

]]> By: maksim00 http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-369 maksim00 Fri, 28 Nov 2008 08:30:43 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-369 1. create undo tablespace UNDO_small datafile 'undosmall1.dbf' size 100m; 2. alter system set undo_tablespace=UNDO_small; 3. restart instance. 4. drop tablespace UNDO_OLD including contents; 1. create undo tablespace UNDO_small datafile ‘undosmall1.dbf’ size 100m;
2. alter system set undo_tablespace=UNDO_small;
3. restart instance.
4. drop tablespace UNDO_OLD including contents;

]]> By: jayachandran http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-368 jayachandran Thu, 27 Nov 2008 09:48:08 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-368 Thanks for giving me a idea to do such thing in a live database Thanks for giving me a idea to do such thing in a live database

]]> By: Pavel http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-362 Pavel Wed, 05 Nov 2008 14:35:39 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-362 You can not do select from dba_ tables in mount database state. SQL> startup mount ORACLE instance started. Total System Global Area 289406976 bytes Fixed Size 1290184 bytes Variable Size 109051960 bytes Database Buffers 171966464 bytes Redo Buffers 7098368 bytes Database mounted. SQL> select segment_name,status,tablespace_name from dba_rollback_segs where status='NEEDS RECOVERY'; select segment_name,status,tablespace_name from dba_rollback_segs where status='NEEDS RECOVERY' * ERROR at line 1: ORA-01219: database not open: queries allowed on fixed tables/views only You can not do select from dba_ tables in mount database state.

SQL> startup mount
ORACLE instance started.

Total System Global Area 289406976 bytes
Fixed Size 1290184 bytes
Variable Size 109051960 bytes
Database Buffers 171966464 bytes
Redo Buffers 7098368 bytes
Database mounted.
SQL> select segment_name,status,tablespace_name from dba_rollback_segs where status=’NEEDS RECOVERY’;
select segment_name,status,tablespace_name from dba_rollback_segs where status=’NEEDS RECOVERY’
*
ERROR at line 1:
ORA-01219: database not open: queries allowed on fixed tables/views only

]]> By: Juan Paulo http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-357 Juan Paulo Thu, 30 Oct 2008 22:38:15 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-357 Nitido, seguimos todos los pasos y funciono exelente, muchas gracias. Nota 1: En el paso 5, dice uncomment “undo_management=AUTO”, deberia de ser: comment “undo_management=AUTO”. La nota esta buenisima, con esos pasos solucionamos nuestro problema. Nitido, seguimos todos los pasos y funciono exelente, muchas gracias.

Nota 1: En el paso 5, dice uncomment “undo_management=AUTO”, deberia de ser: comment “undo_management=AUTO”.

La nota esta buenisima, con esos pasos solucionamos nuestro problema.

]]> By: joe zhu http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-354 joe zhu Wed, 22 Oct 2008 19:05:10 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-354 Outstanding solution. Really helped me out. Big thanks. Outstanding solution. Really helped me out.

Big thanks.

]]> By: John MacLean http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-340 John MacLean Thu, 04 Sep 2008 02:43:11 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-340 The database needs to be open to drop/ create a tablespace. The database needs to be open to drop/ create a tablespace.

]]> By: Chandan http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-296 Chandan Wed, 28 May 2008 22:58:59 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-296 This article really helped me to come out of an UNDO related problem. The process is nice. Thanks. This article really helped me to come out of an UNDO related problem. The process is nice. Thanks.

]]> By: How to drop and recreate oracle undo tablespace and its datafile: http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-284 How to drop and recreate oracle undo tablespace and its datafile: Mon, 19 May 2008 18:48:37 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-284 [...] From my-whiteboard.com [...] [...] From my-whiteboard.com [...]

]]> By: Djuro http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-263 Djuro Wed, 07 May 2008 14:57:40 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-263 Very, very good procedure .. thanks Very, very good procedure .. thanks

]]> By: Oracle http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-241 Oracle Mon, 28 Apr 2008 17:57:57 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-241 Hemant K Chitale, This article is wonderful. I support this doc. http://www.praetoriate.com/t_grid_rac_undoc_init_procedures.htm _CORRUPTED_ROLLBACK_SEGMENTS. Only way to start up with corrupted public rollback segments. Can be used without fear of desupport. Hemant K Chitale,

This article is wonderful. I support this doc.

http://www.praetoriate.com/t_grid_rac_undoc_init_procedures.htm
_CORRUPTED_ROLLBACK_SEGMENTS. Only way to start up with corrupted public rollback segments. Can be used without fear of desupport.

]]> By: Hemant K Chitale http://www.my-whiteboard.com/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files/comment-page-1/#comment-185 Hemant K Chitale Tue, 08 Jan 2008 08:29:09 +0000 http://www.my-whiteboard.com/oracle-dba/2007/03/09/how-to-drop-and-recreate-oracle-undo-tablespace-and-its-data-files.html#comment-185 I strongly suggest that you do not advise DBAs to use such methods. Advise them to read the standard Oracle Docs and contact Oracle Support . "_corrupted_rollback_segments" is a NO NO ! Hemant K Chitale I strongly suggest that you do not advise DBAs to use such methods.
Advise them to read the standard Oracle Docs and contact Oracle Support .
“_corrupted_rollback_segments” is a NO NO !
Hemant K Chitale

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