"PX SEND HASH" Distribution Sending Nearly all Rows to One Worker when Doing Outer Join
(Doc ID 2472931.1)
Last updated on AUGUST 26, 2021
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2 to 12.2]
Information in this document applies to any platform.
When an outer join is used and HASH JOIN OUTER is seen in the explain plan, one of the consumer workers seems to do most of the work on the hash join.
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