In short, you need to wrap the user’s provided task with another function that will: Invoke the user function or callable object. Lock the mutex and decrement the counter. I may not be understanding all the requirements for this thread pool. Thus, for clarity, here is an explicit list as to what I believe are … Read more
Per request means when an HTTP request is made, a thread is created or retrieved from a pool to serve it. One thread serves the whole request. Thread per connection would be the same thing except the thread is used for an entire connection, which could be multiple requests and could also have a lot … Read more
Today, I would recommend using Task.CompletedTask to accomplish this. Pre .net 4.6: Using Task.FromResult(0) or Task.FromResult<object>(null) will incur less overhead than creating a Task with a no-op expression. When creating a Task with a result pre-determined, there is no scheduling overhead involved.
This is the simplest, naive, thread-pool implementation for educational purposes I could come up with (C# / .NET 3.5). It is not using the .NET’s thread pool implementation in any way. using System; using System.Collections.Generic; using System.Threading; namespace SimpleThreadPool { public sealed class Pool : IDisposable { public Pool(int size) { this._workers = new LinkedList<Thread>(); … Read more
It means that IIS is free to use more than one thread to handle a single request, although not in parallel. Basically, IIS tries to perform I/O operations asynchronously, thus freeing the calling thread for the duration of the operation. That thread is returned to the pool and can be used to handle other requests … Read more
I prefer to use ScheduledThreadPoolExecutor. Generally, if I understand your requirements correctly, all these can be implemented in your activity, TimerTask and Handler are not needed, see sample code below: public class MyActivity extends Activity { private ScheduledExecutorService scheduleTaskExecutor; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); scheduleTaskExecutor= Executors.newScheduledThreadPool(5); // This schedule a task to run every … Read more
The optimal number of threads to use depends on several factors, but mostly the number of available processors and how cpu-intensive your tasks are. Java Concurrency in Practice proposes the following formal formula to estimate the optimal number of threads: N_threads = N_cpu * U_cpu * (1 + W / C) Where: N_threads is the … Read more
Probably simplest and preferred solution is in Marco13’s answer so don’t get fooled by vote difference (this answer is few years older) or acceptance mark (it just means that this solution was appropriate for OP circumstances, not that it is best in general). You can use ThreadFactory to set threads inside Executor to daemons. This … Read more
I would suggest you use a thread pool in C# for the same reasons as any other language. When you want to limit the number of threads running or don’t want the overhead of creating and destroying them, use a thread pool. By small tasks, the book you read means tasks with a short lifetime. … Read more
I’ve struggled to find really detailed information on how the ThreadedConnectionPool works. https://bbengfort.github.io/observations/2017/12/06/psycopg2-transactions.html ain’t bad, but it turns out that its claim that getconn blocks until a connection becomes available is incorrect. Checking the code, all ThreadedConnectionPool adds is a lock around the AbstractConnectionPool methods to prevent race conditions. If more than maxconn connections are … Read more