Unexpired Segments Found In Unused UNDO Tablespace
Last updated on MARCH 02, 2017
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Information in this document applies to any platform.
Querying dba_undo_extents view shows unexpired extents in an undo tablespace that is not the current undo tablespace of the database.
This is an old undo tablespace with no transactions attached to it and database has switched to a new undo tablespace.
Below is a sample set of steps to simulate this behaviour:
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