.NET Core plugin

.NET Core is an open-source and cross-platform framework to build applications for all operating system including Windows, Mac, and Linux. .NET Core is a fork of the NET Framework, a modular implementation that can be used in a wide variety of verticals, scaling from the data center to touch based devices.

More information on: https://www.microsoft.com/net

How it works

This plugin analyzes the performance of your .NET Core application.

The minimal supported version of .NET Core is 1.1.x.


For gathering global statistics, the AppMetric library is used alongside with the CoScale extension. You can download the extension from https://github.com/CoScale/ResourceMetrics/releases.

Add the AppMetrics library and the CoScale extension to the project: <project-dir>WebApplication1.csproj:

<PackageReference Include="App.Metrics.AspNetCore.Mvc" Version="2.0.0-alpha" />
<PackageReference Include="App.Metrics.AspNetCore.Tracking" Version="2.0.0-alpha" />
<Reference Include="ResourceMetrics">

Change the Program.cs file to enable AppMetrics:

public static class Program
public static IWebHost BuildWebHost(string[] args)
return WebHost.CreateDefaultBuilder(args)

public static void Main(string[] args) { BuildWebHost(args).Run(); }

Change the Startup.cs file in order to allow App Metrics to inspect MVC routes:

public class Startup
public void Configure(IApplicationBuilder app)

public void ConfigureServices(IServiceCollection services)
services.AddMvc(options => options.AddMetricsResourceFilter());

Build the application to apply these changes.

Provide the status URL, as you configured it on your server. E.g.: http://localhost/metrics

Active checks

This plugin can be configured to perform a HTTP GET on your .NET Core application. This active monitoring allows us to calculate the uptime of the service and the response time of the provided URL.

A full URL (eg. http://localhost/test_page) should be provided.


Metric name Metric unit
.NET Core active check latency s
.NET Core active check uptime %
.NET Core Active Requests #
.NET Core Application Performance Index  
.NET Core Application Performance Index score  
.NET Core Average POST Size b
.NET Core Average PUT Size b
.NET Core GC last GC time s
.NET Core GC total collection count #
.NET Core GC total memory b
.NET Core One Minute Error Percentage Rate req
.NET Core Process maximum physical memory set b
.NET Core Process nonpaged system memory size b
.NET Core Process paged memory size b
.NET Core Process peak paged memory size b
.NET Core Process peak working set b
.NET Core Process threads count #
.NET Core Process total processor time %
.NET Core Process user processor time %
.NET Core Process virtual memory size b
.NET Core Process working set b
.NET Core Request Error count #
.NET Core Request Error Rate req
.NET Core Request Error Rate Per Endpoint req
.NET Core Request Error Rate Per Endpoint And Status Code req
.NET Core Total Transactions req
.NET Core Total Transactions duration s
.NET Core Transactions Per Endpoint req
.NET Core Transactions Per Endpoint duration s