What is Automatic Undo Management?
Automatic Undo Management provides a new and extremely simple way to manage undo (Rollback) data in a database. It enables the database server to automatically manage allocation and management of Undo space among various active sessions. Administrators merely need to create an UNDO tablespace with sufficient disk space instead of manually creating a number of rollback segments and strategically assigning transactions to rollback segments large enough to accommodate generated rollback data.
