PX Worker Load not Evenly Distributed across RAC Nodes
(Doc ID 2537986.1)
Last updated on JULY 15, 2021
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 to 18.104.22.168.0 [Release 12.1 to 18]
Information in this document applies to any platform.
The majority of PX workers 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 worker 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.
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