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PX Slave Load not Evenly Distributed across RAC Nodes (Doc ID 2537986.1)

Last updated on OCTOBER 23, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 to 18.1.0.0.0 [Release 12.1 to 18]
Information in this document applies to any platform.

Symptoms

The majority of PX slaves are repeatedly allocated to the same RAC node that has a significantly higher load than the other RAC nodes.   

In this example, it was Node 2 of an 8-node RAC cluster that was always picked for slave allocation, when in fact it was significantly more loaded than the other nodes.  Tracing with [PX_Control] and [PX_Messaging] shows that resource manager estimates the load on Node 2 is low.

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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