Azure Web Apps Monitoring Metrics and App Service Plan

I am looking into web Apps Monitoring in Microsoft Azure and I can see a variety of options in the portal. I have some questions in those which I will put forward one by one. The question length may be a bit long so apologies in advance :-)

1. Process Explorer

Here we can find process details per instance which are running for my Web App.In case of scale out we will also see multiple instances. I want to know why we are seeing 2 processes per instance and what is the significance of each process.

2.Metrics Per Instance (Apps)

While looking at this report, I can see 2 different tabs (see image), I am unable to map it to the instances I am having in my web apps.

2.A) Is it true that If I have multiple deployment slots/ scaled out instances I will see that many tabs in the report?

2.B) Is there a way by which I can map these to my Web App instances in the Process Explorer

3.Metrics Per Instance App Service Plan Here Again we have to different indicators same as in Apps. Can some please help me how to decipher these.

Can you guys please help me out with the reports as it seems to be quite confusing and I am unable to map it with my Instances, Deployment Slots in relation to the app service Plan.

Once again apologies for a long question. Thanks in Advance, Mayank

Looks like no one answered this in a long time. Let me see if I can explain this better.

This blade that you are talking about is accessible under "Diagnose and solve problems" options of an App Service Web App. Lot of changes has been made in the last few months to this feature. Read more about it here: Azure App Service - Diagnostics and Solve

1. Why we are seeing 2 processes per instance and what is the significance of each process.

In Azure App Service. For every web app there is another web app provisioned. This site is known as KUDU. So one w3wp.exe corresponds to the process hosting your code and the second w3wp.exe corresponds to the process hosting the KUDU. This process will have a SCM tag appended against it. You can read more about it here: Project Kudu - Github

2.Is it true that If I have multiple deployment slots/ scaled out instances I will see that many tabs in the report? Is there a way by which I can map these to my Web App instances in the Process Explorer

To answer the first part, YES, the tabs corresponds to the number of instances the app service plan is scaled out to. So if your web app is scaled out to 7 instances, then you will see 7 tabs in the report.

There is no straight approach to correlate the instance names to process explorer. There is an alternate way. I have a blog post using which you can connect to the KUDU site of a web app on a specific instance. See this: Connect to Kudu site of a specific instance

3. Metrics Per Instance App Service Plan Here Again we have to different indicators same as in Apps. Can some please help me how to decipher these.

as the name says, Metrics per instance (App Service Plan) displays data for the entire VM, while Metrics per Instance (Apps) displays data for a specific web app or process (w3wp.exe). In Azure App Service, you can provision several web apps inside a VM. So, this view provides a holistic view of the overall usage of the VM. This will help you in determining whether you need to scale out or scale up.

I hope this answers this question.