...
This property governs the behavior of what method should be used for merging these tuples. In the default method, the tuples are merged using a disk-backed (swap-able) tree-map. In the other method, if the tuples are sorted, they can be merged via a “sorted merge” method which guarantees a tuple would be completed before being swapped to disk.
Values and behavior:
true: If this property is true, tuples are sorted by the sender query engine before shuffle happens and a “sorted merge” is used at the receiver query engine as explained above.
false: If set to false, it will keep running as earlier.
Default Value:
false
Scope:
...