引數FAST_START_PARALLEL_ROLLBACK

Property	Description
Parameter type	String
Syntax	FAST_START_PARALLEL_ROLLBACK = { HI | LO | FALSE }
Default value	LOW
Modifiable	ALTER SYSTEM
Basic	No

FAST_START_PARALLEL_ROLLBACK determines the maximum number of processes that can exist for performing parallel rollback. This parameter is useful on systems in which some or all of the transactions are long running.

Values:

• FALSE indicates that parallel rollback is disabled

• LOW limits the number of rollback processes to 2 * CPU_COUNT

• HIGH limits the number of rollback processes to 4 * CPU_COUNT

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