Insert Portion of Parallel MERGE Seems to Run Serially (PX SEND HYBRID (ROWID PKEY) )

(Doc ID 1682626.1)

Last updated on JANUARY 27, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.

Symptoms

The INSERT portion of a MERGE statement seems to run serially because a single slave (or possibly only a few slaves) are doing all the work.   The explain plan shows "PX SEND HYBRID (ROWID PKEY).

 

Cause

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