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Understanding Cpu Usage On pulse and JMX

Applies to

GemFire 8.0 and later

Purpose

This document attempts to address some confusion in Pulse and JMX, where the CPU usage for each member is showing a much higher CPU percentage than "top" command is showing in the OS.

Description

There are two value in JMX: CpuUsage and HostCpuUsage

HostCpuUsage shows the total CPU usage of all process, which is exactly what is shown in output of the top command

CpuUsage shows the percentage of total CPU usage used by the GemFire process

Similarly, for Pulse, if you hover the mouse over the NODE (green square box) it shows HostCpuUsage, while, by clicking on the NODE box, you will get all the processes (orange or blue circle with square dot). When you hover the mouse over those, you will see the percentage of total CPU usage used by the selected process.

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