I have SUN Solaris 10 - Oracle 10.2.4
I tried using auto undo but performance was horrible - my Friday night archive never finished.
It ran for over 24 hours instead of 3 or 4 hours.
So I have put undo back to manual.
I want to resize the rollback segments to make them bigger.
1. Can I do this on the fly with production up and running.
2. How do I ensure that there is nothing being lost if I take a segment offline, drop it and recreate it?
3. initial and next are currently set 20 8k with optimal at 16k - would 10 or 15k initial/next be better?