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Moving from rollback segemnts to AUM [message #150309] Wed, 07 December 2005 03:10 Go to next message
ankurgodambe
Messages: 45
Registered: March 2005
Member
Hi,

I have upgraded my database from 8.1.6 to 9.2.0.7. I also want to do away with rollback segemnts and configure Automatic undo management. To achieve this here is what i am doing:

1. Create undo tablespace with the command:
create undo tablespace undotbs1 "path" size xxx extent management local;

2. Shutdown the database and change init.ora file:
undo_tablespace=undotbs1
undo_management=auto

3. Startup and drop all the rollback segments in rbs tablespace(rbs tablespace is where i had rollback segments in 8.1.6).

drop rollback segment rbs1;
...
drop rollback segment rbs16;

4. Finally droppping the rbs tablespace:
drop tables rbs;


This has woked for me. But what i would like to know is of there is anyone who has ever done this? and if there is something i am missing out on?

Thanks
Re: Moving from rollback segemnts to AUM [message #150406 is a reply to message #150309] Wed, 07 December 2005 14:49 Go to previous message
Frank Naude
Messages: 4587
Registered: April 1998
Senior Member
Sounds like you did a great job. Also look at UNDO_RETENTION and possibly UNDO_SUPPRESS_ERRORS (9i only).

Best regards.

Frank
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