How to configure performance monitoring?

Hi!

I am setting up performance tracing for our .NET projects and have configured SDK settings and am getting error tracebacks, but no performance monitoring data for transactions. We are running .NET Core 3.1 web application with REST API controllers. The SDK docs talk about TracesSampleRate but setting it does not seem to affect the setup for SDK version 3.0.6. On version 3.0.0-alpha.10 everything works as expected but that version seemed to collect everything by default if I recall correctly.

These are the documents I have been referencing:

• https://docs.sentry.io/platforms/dotnet/performance/
• https://docs.sentry.io/platforms/dotnet/guides/aspnetcore/performance/

This is configuration I am using for testing in Program.cs:

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace Example
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((hostingContext, config) =>
                {
                    config.AddEnvironmentVariables();
                })
                .ConfigureLogging((c, l) =>
                {
                    l.AddConfiguration(c.Configuration);

                    // Adding Sentry integration to Microsoft.Extensions.Logging
                    // https://docs.sentry.io/platforms/dotnet/microsoft-extensions-logging/
                    l.AddSentry();
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                    webBuilder.UseSentry();
                });
    }
}

And appsettings.json:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "Sentry": {
    "Dsn": "https://[e-mail]/456",
    "TracesSampleRate": 1.0,
    "SampleRate": 1.0,
    "Debug": true,
    "Environment": "local"
  },
  "AllowedHosts": "*"
}

[bruno-garcia]

Some docs landed for ASP.NET Core: https://docs.sentry.io/platforms/dotnet/guides/aspnetcore/performance/included-instrumentation/

Thanks again for raising and keep the feedback coming 🙏

[aleksihakli]

Makes sense, thanks @bruno-garcia!