Right. Oracle support has also suggested that we enable offlining from time to time disabling it completely might cause some side effects so be careful.
> we are getting a lot of traces files with the following information, does > anybody know why this traces appear and how to supress them?
I remember there was a bug (and possible instance hang) that I suppose has already been fixed (220.127.116.11/10g?), but you could get rid of the continuous undo offlining/onliing with event 10511, level 2.
-- Best regards, Alex Gorbachev