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High SYS CPU Usage ON LMS Thread (SCMN/CR00/RS01) During High Workload (Doc ID 2707048.1)

Last updated on SEPTEMBER 03, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 18.0.0.0 and later
Information in this document applies to any platform.

Symptoms

ON 6-node 19.5 RAC On Red Hat Enterprise 7, it's observed that high SYS CPU is utilized by lms/scmn process/thread during high workload. for example, the issue can be reproduces by below test:

The issue not only happens on standby, it can also happen on primary or any other RAC environments during high workload.

High sys CPU can be observed on LMS/SCMN from top command.

Changes

 No changes, new created environment.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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