Change Undo mode to Rollback using pfile

Here are the steps to move from  UNDO mode to Rollback Segment using pfile like parameter file. The changes in the init.ora must be made with a text editor, of course, spfile is more powerful.

We create a tablespace for the Rollback Segment.


Restart the instance setting UNDO to manual.

  1. Shutdown
  2. Set undo_management = ‘manual’
  3. Startup

We create a Rollback Segment


Restart the instance again and configure the parameter rollback_segments, UNDO_MANAGEMENT must remain to manual value.

  1. Shutdown
  2. Set rollback_segments=’my_rollback’
  3. Startup

Is very easy.





Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s