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Very High Values Listed for Parallel Execution "Servers Requested" and "Servers Allocated" in SQL Monitor Output (Doc ID 3003061.1)

Last updated on FEBRUARY 17, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 19.21.0.0.0 and later
Information in this document applies to any platform.

Symptoms

When viewing details of a particular query, (which is executed high number of times), from SQL Monitor, very high values are seen for "Servers Requested" and "Servers Allocated" in the "Parallel Execution Details".
For example:

The Degree of Parallelism (DOP) however is set correctly to 4, as chosen in the PARALLEL Hint for the query.

The DOP downgrade is also listed as just 3% but we see:

Servers Requested=10600
Servers Allocated=10296

This document explains why the values for "Servers Requested" and "Servers Allocated" are shown as such high values.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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