UNDO_MANAGEMENT

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

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