How to Determine How Many Parallel Slave Groups an Execution Plan Requires (Doc ID 1366174.1)

Last updated on JUNE 01, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.3 [Release 9.2 to 11.2]
Information in this document applies to any platform.

Goal

Sometimes a given query seems to utilize more parallel slaves than might be anticipated. This document explains how to interpret the execution plan of a statement to determine how many slave 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.

Solution

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