Azure App Service Plan Overview shows different CPU usage than Application Insights Live Metrics

0
votes

I have an Azure App Service Plan (tier P1V2) that contains a number of App Services. Each of the App Services is attached to an Application Insights instance.

The App Service Plan Overview shows a CPU usage summary of 100%, but Application Insights Live Metrics shows a very low CPU usage.

Is there an explanation for the values being very different or am I doing something wrong?

Here are images showing what I am seeing. (Note that the first is taken over roughly 1 hour and the second one is over 60-seconds, but the figures have been the same throughout the time I have been looking at this.)

App Service Plan Overview

Application Insights Live Metrics

1
azure-web-app-serviceazure-application-insightsazure-app-service-plans

1 Answers

2
votes

About the difference between the two charts:

What is shown in 'Live Metrics Stream' is the CPU usage of w3wp process, whereas what is shown in App Service Plan level is the total Machine CPU usage.

For the 100% CPU usage in Application Insight. You can use Diagnostics and Solve Problem to see what going wrong. enter image description here enter image description here

You also can have a look at this issue to find out what process is occupying CPU kindly look for total_cpu_time/user_cpu_time/privileged_cpu_time..