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How To Identify The Session/Process Using A Specific UNDO Tablespace ? (Doc ID 2876974.1)

Last updated on JUNE 21, 2022

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


For shrinking UNDO tablespace, you have created a new UNDO tablespace and changed UNDO_TABLESPACE parameter
according to a document :

How to Shrink the datafile of Undo Tablespace (Doc ID 268870.1)


You don't want to reboot (shutdown/startup) the instance, but you can kill some existing sessions.
How do you determine which sessions/processes are using the old UNDO tablespace ?


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