UNDO_MANAGEMENT

UNDO_MANAGEMENT specifies which undo space management mode the system should use.

Property	Description
Parameter type	String
Syntax	UNDO_MANAGEMENT = { MANUAL | AUTO }
Default value	AUTO
Modifiable	No
Modifiable in a PDB	Yes
Basic	No
Oracle RAC	Multiple instances must have the same value.

When UNDO_MANAGEMENT is set to AUTO, the instance starts in automatic undo management mode. In manual undo management mode, undo space is allocated externally as rollback segments.

Note: In a CDB, the UNDO_MANAGEMENT initialization parameter must be set to AUTO, and an undo tablespace is required to be created to manage the undo data.

See Also:

• Oracle AI Database Administrator’s Guide for more information about this parameter

• Oracle AI Database Administrator’s Guide for more information about managing undo data