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App Metrics <img src="https://www.app-metrics.io/images/logo.png" alt="App Metrics" width="50px"/>

What is App Metrics?

App Metrics is an open-source and cross-platform .NET library used to record metrics within an application. App Metrics can run on .NET Core or on the full .NET framework. App Metrics abstracts away the underlaying repository of your Metrics for example InfluxDB, Graphite, Prometheus etc, by sampling and aggregating in memory and providing extensibility points to flush metrics to a repository at a specified interval.

App Metrics provides various metric types to measure things such as the rate of requests, counting the number of user logins over time, measure the time taken to execute a database query, measure the amount of free memory and so on. Metrics types supported are Gauges, Counters, Meters, Histograms and Timers and Application Performance Indexes Apdex.

App.Metrics includes an Exponentially Forward Decaying, Sliding Window and Algorithm R reservoir implementations. For more details on reservoir sampling see the docs.

Documentation

Latest Builds, Packages & Repo Stats

Branch	Azure Devops
dev
main

Visualization

Dashboards can be imported from Grafana

Grafana Web Monitoring

Grafana/InfluxDB Generic Web Dashboard Demo

Grafana OAuth2 Client Web Monitoring

Grafana/InfluxDB Generic OAuth2 Web Dashboard Demo

How to build

Azure Devops builds are triggered on commits and PRs to the dev branch

Install the latest .NET Core 2.x SDK
Run build.ps1 or build.sh in the root of the repository

How to run benchmarks

App.Metrics includes benchmarking using BenchmarkDotNet.

Two benchmark projects exist targeting App.Metrics.Core and App.Metrics.Concurrency

	cd .\src\Core\benchmarks\App.Metrics.Benchmarks.Runner
	dotnet run -c "Release" --framework netcoreapp3.1

	cd .\src\Concurrency\benchmarks\App.Metrics.Concurrency.Benchmarks.Runner
	dotnet run -c "Release" --framework netcoreapp3.1

You'll then be prompted to choose a benchmark to run which will output a markdown file with the result in directory.

You can find the benchmark results here and here.

Contributing

See the contribution guidlines for details.

Acknowledgements

Thanks for providing free open source licensing

License

See LICENSE

App Metrics is based on the Metrics.NET library, and at the moment uses the same reservoir sampling code from the original library which is a port of the Java Dropwizard Metrics library.