High CPU Usage on servers with many cores

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Article ID: 77229

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Updated On:

Products

APP PERF MANAGEMENT CA Application Performance Management Agent (APM / Wily / Introscope) CUSTOMER EXPERIENCE MANAGER INTROSCOPE

Issue/Introduction

After installing the Java Agent, CPU Usage spikes up 50% on servers with 100+ CPUs.

Cause

  The high CPU was related to enabling platform monitoring and its gathering of aggregated CPU utilizations - particularly if multiple agents are trying to access the information simultaneously.

Environment

 Server with 100+ CPUs

Resolution

Set the following agent parameter in the agent profile:
introscope.agent.disableAggregateCPUUtilization=true

If there are multiple agents on a server, all but one should be set to this to prevent CPU contention.