Add More Information about Thread Pool

[TheCodeTraveler]

How to monitor the Thread Pool?

using System;
using System.Threading;

class Program
{
    static void Main()
    {
        // Get the maximum number of threads allowed in the pool
        ThreadPool.GetMaxThreads(out int maxWorkerThreads, out int maxIoThreads);

        // Get the number of threads that are currently free/idle
        ThreadPool.GetAvailableThreads(out int availWorkerThreads, out int availIoThreads);

        // Calculate how many threads are actively running tasks
        int activeWorkerThreads = maxWorkerThreads - availWorkerThreads;
        int activeIoThreads = maxIoThreads - availIoThreads;

        Console.WriteLine($"--- Thread Pool Status ---");
        Console.WriteLine($"Worker Threads: {activeWorkerThreads} active / {maxWorkerThreads} max");
        Console.WriteLine($"I/O Threads:    {activeIoThreads} active / {maxIoThreads} max");
    }
}

How can I manually configure the Thread Pool?

• Don't touch MaxThreads unless you have a highly isolated, specific architecture requirement.
• Only increase MinThreads if you are running a high-scale microservice (e.g., in Kubernetes) that encounters dramatic bursts of traffic, or if diagnostic tools (dotnet-counters) explicitly show your application suffering from Thread Pool Starvation.
• The real fix for thread pool exhaustion is almost always fixing code-level architecture—replacing synchronous blocking calls (.Wait()) with proper async/await primitives.

using System;
using System.Threading;

// Set the minimum "pre-warmed" threads
// Arguments: (workerThreads, ioThreads)
ThreadPool.SetMinThreads(100, 100);

// Set the maximum upper limit of threads allowed
ThreadPool.SetMaxThreads(500, 500);

<PropertyGroup>
  <ThreadPoolMinThreads>100</ThreadPoolMinThreads>
  <ThreadPoolMaxThreads>500</ThreadPoolMaxThreads>
</PropertyGroup>