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Oracle® Database Reference
10g Release 2 (10.2)

Part Number B14237-02
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UNDO_MANAGEMENT

Property Description
Parameter type String
Syntax UNDO_MANAGEMENT = { MANUAL | AUTO }
Default value MANUAL
Modifiable No
Basic Yes
Real Application Clusters 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.