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Full UNDO Tablespace In 10gR2 and above (Doc ID 413732.1)

Last updated on JUNE 19, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


In a 10gR2 database with an UNDO tablespace created in NO AUTOEXTEND mode, having transactions running in the database, apparently the UNDO tablespace appears to be full.

Also many UNEXPIRED undo segments can be seen when selecting  from dba_undo_extents view, although no ORA-1555 or ORA-30036 errors are reported.


Starting with 10gR2, the max retention was introduced.


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