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UNEXPIRED or EXPIRED extents stolen ?

edited Aug 20, 2010 3:25AM in Database Administration (MOSC) 3 commentsAnswered
 Reference : 
Troubleshooting ORA-30036 - Unable To Extend Undo Tablespace [ID 460481.1]

4. If there is no free extent available then steal from an offline undo segment. Deallocate the extent from the offline undo segment and add it to the current undo segment. Return the first free block of the extent.


5. Steal from online undo segment. Deallocate the extent from the online undo segment and add it to the current undo segment. Return the first free block of the extent.



Qn. Based on above, which extents are stolen ? Is it UNEXPIRED or EXPIRED extents ?

Also, is there a way to know if the extents unexpired or not via a query ? 

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