DotNet Metrics Tool

Real-time monitoring tool for .NET Core process metrics. Monitor any .NET process by PID and get JSON output with CPU usage, memory consumption, and performance metrics.

Features

• 🔍 Real-time monitoring - Updates every second
• 📊 Comprehensive metrics - CPU usage, memory consumption, working set, private memory
• 📝 JSON output - Structured data perfect for logging and analysis
• 💾 File output - Save metrics to file for continuous monitoring
• 🚀 Cross-platform - Works on Windows, Linux, and macOS
• ⚡ Lightweight - Minimal overhead on system resources
• 🛠️ Easy installation - Install as a global .NET tool

Installation

Install as a global .NET tool:

dotnet tool install --global DotNetMetrics.Tool

Usage

Basic monitoring (console output)

dotnet-metrics <PID>

Save to file (silent mode)

dotnet-metrics <PID> --out metrics.json dotnet-metrics <PID> -o /path/to/metrics.json

Find process PID

Windows (PowerShell):

Get-Process | Where-Object {$_.ProcessName -like '*your-app*'}

Linux/macOS:

ps aux | grep your-app

Alternative (Command Prompt)

tasklist | findstr "process_name"

Task Manager

1. Open Task Manager (Ctrl+Shift+Esc)
2. Go to "Details" tab
3. Find your process and check the "PID" column

Example Output

{ "timestamp": "2025-08-25T10:30:45.123Z", "processId": 1234, "processName": "MyApp", "cpuUsagePercent": 15.67, "memoryUsageMB": 256.78, "workingSetMB": 312.45, "privateMemoryMB": 189.23 }

Metrics Explained

• timestamp - ISO 8601 timestamp of the measurement
• processId - Process ID being monitored
• processName - Name of the process
• cpuUsagePercent - CPU usage as percentage (0-100)
• memoryUsageMB - Paged memory usage in megabytes
• workingSetMB - Physical memory usage in megabytes
• privateMemoryMB - Private memory usage in megabytes

Use Cases

• Performance monitoring - Track application resource usage
• CI/CD pipelines - Monitor test execution performance
• Production monitoring - Continuous performance tracking
• Debugging - Identify memory leaks and CPU spikes
• Load testing - Monitor application behavior under load

Parameters

Parameter	Short	Description
<PID>	-	Process ID to monitor (required)
--out	-o	Output file path (optional)

Usage Examples

Option 1: Direct via .NET CLI

cd DotNetMetrics.Console dotnet run <PID>

Option 2: Using helper scripts

Windows Command Prompt

monitor_process.bat <PID>

PowerShell

.\monitor_process.ps1 -ProcessId <PID>

Example Commands

dotnet run 1234 # or monitor_process.bat 1234 # or .\monitor_process.ps1 -ProcessId 1234

Where 1234 is the PID of the .NET Core process you want to monitor.

Stopping Monitoring

Press Ctrl+C to stop monitoring.

Self-contained Builds

Pre-built self-contained executables are available for all major platforms:

Platform	Executable	Size
Windows x64	builds/win-x64/DotNetMetrics.Console.exe	~12 MB
Windows x86	builds/win-x86/DotNetMetrics.Console.exe	~11 MB
Windows ARM64	builds/win-arm64/DotNetMetrics.Console.exe	~12 MB
Linux x64	builds/linux-x64/DotNetMetrics.Console	~13 MB
Linux ARM64	builds/linux-arm64/DotNetMetrics.Console	~13 MB
macOS x64	builds/osx-x64/DotNetMetrics.Console	~13 MB
macOS ARM64	builds/osx-arm64/DotNetMetrics.Console	~13 MB

Building Self-Contained Executables

Build for Current Platform (Windows)

.\build-windows.ps1

Build for All Platforms

.\build-all-platforms.ps1

List Built Executables

.\list-builds.ps1

See BUILD.md for detailed build instructions.

Requirements

• .NET 8.0 or higher
• Appropriate permissions to read process information

Building from Source

git clone https://github.com/jakubkozera/dotnet-metrics.git cd dotnet-metrics dotnet pack DotNetMetrics.Console --configuration Release dotnet tool install --global --add-source ./nupkg DotNetMetrics.Tool

Troubleshooting

"Process with PID X not found"

• Check if the process actually exists
• Verify the PID is correct

"Cannot access process"

• Run the application as administrator
• Check if the process is still running

High CPU usage in first measurement

• The first CPU measurement may be imprecise
• The application performs baseline measurement before starting actual monitoring

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Author

Jakub Kozera

• GitHub: @jakubkozera

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