Tag: threadpool

Java thread pool cacheable thread pool Executors.newCachedThreadPool() and blocking queue SynchronousQueue

Reprint: https://www.cnblogs.com/lcmlyj/p/16375326.html public static ExecutorService newCachedThreadPool() {<!– –> return new ThreadPoolExecutor(0, Integer.MAX_VALUE, 60L, TimeUnit.SECONDS, new SynchronousQueue<Runnable>()); } int c = ctl.get(); //1. if (workerCountOf(c) < corePoolSize) {<!– –> if (addWorker(command, true)) return; c = ctl.get(); } //2. if (isRunning(c) & amp; & amp; workQueue.offer(command)) {<!– –> int recheck = ctl.get(); if (! isRunning(recheck) & amp; […]

How to elegantly customize the ThreadPoolExecutor thread pool

Hello, I am a passerby. For more high-quality articles, please see my personal blog: http://itsoku.com 1. Overview Multi-threading is often needed in Java to handle some businesses. It is highly not recommended to simply inherit Thread or implement the Runnable interface to create threads, as this will inevitably involve creation and destruction. Threads consume resources […]

ThreadPoolTaskExecutorThe data is not finished when running tasks in multiple threads

1. Problem description: Check the data in a loop, and then use multiple threads to update the found data The code is as follows: Table creation statement CREATE TABLE `tb_user` ( `id` int NOT NULL AUTO_INCREMENT COMMENT ‘id’, `name` varchar(50) DEFAULT NULL COMMENT ‘name’, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 Entity class @Data @TableName(“tb_user”) […]

A simple explanation of ThreadPoolExecutor (1)

Article directory Thread pool brief complaint Detailed explanation of ThreadPoolExecutor Detailed explanation of ThreadPoolExecutor parameters Tool class Executors for creating thread pools Task rejection policy Thread pool brief complaint For various pools, such as Connection pool: used to manage and reuse database connections to avoid the performance overhead caused by frequent creation and destruction of […]

Use ThreadPoolExecutor to manage thread pools

Use ThreadPoolExecutor to manage thread pools In multi-threaded programming, the thread pool is a key tool that can effectively manage the life cycle of threads and improve program performance and resource utilization. Java provides a powerful thread pool implementation called ThreadPoolExecutor. 1. Introduce ThreadPoolExecutor ExecutorService executor = new ThreadPoolExecutor( corePoolSize, // Number of core threads […]

In-depth anatomy of thread pool (ThreadPoolExecutor)

Directory 1 Thread Pool (ThreadPoolExecutor) 2 Use of thread pool (Executors) 2.1 newFixedThreadPool 2.2 newCachedThreadPool 2.3 newSingleThreadExecutor 2.4 newScheduledThreadPool In multi-threaded applications, the creation and destruction overhead of threads is relatively high. Every time a thread is created, the operating system needs to allocate resources, and destroying a thread also needs to release resources. The […]

Java multithreading-thread pool ThreadPoolExecutor construction methods and rules

Why use thread pool Blog address http://blog.csdn.net/ Original address http://blog.csdn.net//article/details/71126867 Sometimes, the system needs to handle a lot of requests with short execution times. If each request starts a new thread, the system will continue to create and destroy threads. Sometimes the time spent on creating and destroying threads will be longer. It takes longer […]

Thoughts on java thread pool ThreadPoolExecutor monitoring and dynamic parameter adjustment

Table of Contents For thread pool parameters For task submission strategy Respond quickly to user requests The default strategy of java ThreadPoolExecutor is as follows The tomcat ThreadPoolExecutor strategy is as follows Process batch tasks quickly Thread pool monitoring Dynamic adjustment of thread pool parameters https://mp.weixin.qq.com/s/baYuX8aCwQ9PP6k7TDl2Ww Java thread pool implementation principle and its practice in […]