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Oracle® Database Reference
11g Release 2 (11.2)

E40402-11
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DB_UNRECOVERABLE_SCN_TRACKING

Property Description
Parameter type Boolean
Default value true
Modifiable ALTER SESSION, ALTER SYSTEM
Range of values true | false
Basic No
Oracle RAC Multiple instances must have the same value

DB_UNRECOVERABLE_SCN_TRACKING enables or disables the tracking of unrecoverable (NOLOGGING) direct-path insert and load operations.

When the value is set to true, updates are made to the controlfile that maintains the V$DATAFILE.UNRECOVERABLE_CHANGE# and V$DATAFILE.UNRECOVERABLE_TIME columns. When the value is set to false, updates are not made to the controlfile. Setting this parameter to false may improve performance of direct-path NOLOGGING operations.

Note:

The DB_UNRECOVERABLE_SCN_TRACKING initialization parameter is available starting with Oracle Database 11g Release 2 (11.2.0.2).