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.

create_rollback_ts

Restart the instance setting UNDO to manual.

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

We create a Rollback Segment

create_rollback_seg

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.

HTH – Antonio NAVARRO

 

 

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