Hi.

You can convert DMTs to LMTs using DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL. There are a few limitations relating to space allocation when using this method. It's actually better to create a new tablespace and move the contents across to it.

http://download-west.oracle.com/docs...ce.htm#1001957

You can start Automatic Undo Management at any time. See:

http://www.oracle-base.com/Articles/...Management.asp

Cheers