How to Determine How Many Parallel Worker Groups an Execution Plan Requires
(Doc ID 1366174.1)
Last updated on FEBRUARY 01, 2022
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 to 126.96.36.199 [Release 9.2 to 12.2]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
Sometimes a given query seems to utilize more parallel workers than might be anticipated. This document explains how to interpret the execution plan of a statement to determine how many workers groups and sets are required for execution. Note that the actual degree for the statement is set at execution time and so is not available from the execution plan itself. This degree may vary between executions of the same statement utilizing the same execution plan.
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