Azure App Service Memory Usage. Where to see full breakdown?

27
votes

We recently ran out of memory on our sites under an Azure App Service Plan.

This threw a "Memory Resource Exhausted" error on all Apps.

Clicking "CPU Percentage and Memory Percentage" shows a spike to 82% in last 24 hours.

Navigating to "Metrics per Instance (App Service Plan)" I get a visual of all Web Apps.. Adding up ALL their Working Set in MBs added up to 22% at time of 82% App Service Plan usage.

This SO answer suggests viewing memory usage in Kudu.

Does Azure Dashboard or Kudu have any way to show a break down of specifically "App Service Plan" memory usage?

2
azureazure-web-app-service
Have you tried looking at Memory Percentage on the App Service plan via Azure Monitor? docs.microsoft.com/en-us/azure/monitoring-and-diagnostics/… – Andy Shen
@Andy Shen - My project today is to implement a solution with Microsoft.Azure.Management.Monitor.Fluent SDK from this SO. I would prefer to use Azure Management Libraries for .NET but Monitor is "Coming Soon" - This question was about Kudu or Dashboard. – ttugates

2 Answers

20
votes

Watch a quick video to understand different aspects shown in this view https://www.youtube.com/watch?v=lWeutt1GvRs

  1. Go to the Diagnose and Solve Problems blade for your Azure App in the Azure Portal.
  2. Choose the Availability and Performance category
  3. Choose either Memory Analysis on the left or click on the Memory Usage card on the right
  4. This launches the Memory Analysis tool.

Under the Memory analysis tool:-

  • The very first thing shown is App Service Plan Density – This checks looks for overstuffed App Service Plans and beeps if it finds that you have too many apps in the same app service plan
  • An insight is shown if we detect or more apps consuming high memory
  • Private Bytes consumption for the current app
  • Physical memory in use for each instance allotted to the App Service Plan
  • And then Memory Drill down shows Per instance memory drilldown for each app and its associated process running on that instance.

Screenshot of Memory Drilldown view

App Level Breakdown

enter image description here

4
votes

A dated question, but I've found a view that shows this data that I believe did not exist at the time this question was posted.

Go to Diagnose and solve problems and search for "memory" in the input box labeled "Search App Service Diagnostics" at the top of the view. Choose Memory Drill Down in the results. There you will see a full breakdown of all the apps running per instance on your App Service Plan:

Screenshot 1: Search results for "Memory" in "Diagnose and solve problems" view Screenshot 1

Screenshot 2: Full breakdown of memory usages per app per instance on your App Service Plan Screenshot 2