opentelemetry-dotnet/docs/metrics/getting-started-histogram

Getting Started with OpenTelemetry .NET in 5 Minutes

First, download and install the .NET Core SDK on your computer.

Create a new console application and run it:

dotnet new console --output getting-started-histogram
cd getting-started
dotnet run

You should see the following output:

Hello World!

Install the OpenTelemetry.Exporter.Console package:

dotnet add package OpenTelemetry.Exporter.Console

Update the Program.cs file with the code from Program.cs:

Run the application again (using dotnet run) and you should see the metric output from the console, similar to shown below:

Export 14:30:58.201 14:30:59.177 histogram [tag1=value1;tag2=value2] Histogram, Meter: TestMeter/0.0.1
Value: Sum: 33862 Count: 62
(-? - 0) : 0
(0 - 5) : 0
(5 - 10) : 0
(10 - 25) : 2
(25 - 50) : 0
(50 - 75) : 1
(75 - 100) : 1
(100 - 250) : 6
(250 - 500) : 18
(500 - 1000) : 34
(1000 - ?) : 0

Congratulations! You are now collecting histogram metrics using OpenTelemetry.

What does the above program do?

The program creates a Meter instance named "TestMeter" and then creates a Histogram instrument from it. This histogram is used to repeatedly report random metric measurements until exited after 10 seconds.

An OpenTelemetry MeterProvider is configured to subscribe to instruments from the Meter TestMeter, and aggregate the measurements in-memory. The pre-aggregated metrics are exported every 1 second to a ConsoleExporter. ConsoleExporter simply displays it on the console.