Oracle9i Database Reference Release 1 (9.0.1) Part Number A90190-02 |
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Initialization Parameters, 148 of 220
Parameter type |
Boolean |
Default value |
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Parameter class |
Dynamic: |
Range of values |
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PARALLEL_BROADCAST_ENABLED
lets you improve performance of hash and merge join operations in which a very large join result set is joined with a very small result set (size being measured in bytes, rather than number of rows).
When this parameter is set to true
, the optimizer can choose to copy all the source rows of the small result set and broadcast a copy to each cluster database that is processing some rows of the larger set.
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