Insert Portion of Parallel MERGE Seems to Run Serially (PX SEND HYBRID (ROWID PKEY) )
(Doc ID 1682626.1)
Last updated on FEBRUARY 03, 2019
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
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).
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