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"PX SEND HASH" Distribution Sending Nearly all Rows to One Slave when Doing Outer Join (Doc ID 2472931.1)

Last updated on FEBRUARY 26, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [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 slaves seems to do most of the work on the hash join. 


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