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"_enable_NUMA_support" = true on Exadata causes PX message buffers to come out of the numa pool; possible ORA-12805/ORA-4031 (Doc ID 2378765.1)

Last updated on MARCH 11, 2020

Applies to:

Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Information in this document applies to any platform.

Symptoms

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In 12c+, when PX message buffers come out of the numa pool, it is possible to see ORA-12805/ORA-4031 errors like the following if there is not enough room in the shared pool:

 

Changes

 You are running RDBMS version 12.1.0.1 or higher on Exadata.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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