threadpool

当dubbo服务提供者向消费层传输大数据容量数据时，会受到Dubbo的限制，报类似如下异常： 2019-08-23 11:04:31.711 [ DubboServerHandler-XX.XX.XX.XXX:20880-thread-87] - [ ERROR ] [com.alibaba.dubbo.remoting.transport.AbstractCodec : 86] - Data length too large: 13055248, max payload: 8388608, channel: NettyChannel [channel=[id: 0x7ed65435, /XX.XX.XX.XXX:54065 => /XX.XX.XX.XXX:20880]] java.io.IOException: Data length too large: 13055248, max payload: 8388608, channel: NettyChannel [channel=[id: 0x7ed65435, /XX.XX.XX.XXX:54065 => /XX.XX.XX.XXX:20880]] 原因就是Dubbo服务限制大数据传输，最大限制为8M，此时可以修改dubbo提供者的配置层，修改payload属性值。 1）在dubbo-provider

i have this rather simple question about the ThreadPoolExecutor . I have the following situation: I have to consume objects from a queue, create the appropiate worker tasks for them and submit them to the ThreadPoolExecutor. This is quite simple. But within a shutdown scenario many workers may be queued to execution. Since one of those tasks might be running for an hour, and i want a relativly fast graceful shutdown of the application i want to discard all queued tasks from the ThreadPoolExecutor while the already processing tasks should be completed normally. The ThreadPoolExecutor

Is there a magic number or formula for setting the values of SetMaxThreads and SetMinThreads for ThreadPool? I have thousands of long-running methods that need execution but just can't find the perfect match for setting these values. Any advise would be greatly appreciated. The default minimum number of threads is the number of cores your machine has. That's a good number, it doesn't generally make sense to run more threads than you have cores. The default maximum number of threads is 250 times the number of cores you have on .NET 2.0 SP1 and up. There is an enormous amount of breathing room

What are the benefits of using a JDBC connection pooling tool like DBCP or c3p0 ? in case of a small CRUD application with one user, can we just create one connection session as a singleton ? PS : I'm building a small javafx application back-ended with tiny h2 database (5 tables). 0x6C38 From Jon Skeet's answer to What is the benefit of Connection and Statement Pooling? : Creating a network connection to a database server is (relatively) expensive. Likewise asking the server to prepare a SQL statement is (relatively) expensive. Using a connection/statement pool, you can reuse existing

I create a thread and I put it into an infinite loop. I get memory leaks when checking the code with valgrind . Here is my code: #include <pthread.h> #include <time.h> void thread_do(void){ while(1){} } int main(){ pthread_t th; pthread_create(&th, NULL, (void *)thread_do, NULL); sleep(2); /* I want to kill thread here */ sleep(2); return 0; } So a thread is created in main and just runs thread_do() all the time. Is there a way to kill it from inside main after 2 seconds? I have tried both pthread_detach(th) and pthread_cancel(th) but I still get leaks. As @sarnold pointed out, by default your

It is loosely related to this question: Are std::thread pooled in C++11? . Though the question differs, the intention is the same: Question 1: Does it still make sense to use your own (or 3rd-party library) thread pools to avoid expensive thread creation? The conclusion in the other question was that you cannot rely on std::thread to be pooled (it might or it might be not). However, std::async(launch::async) seems to have a much higher chance to be pooled. It don't think that it is forced by the standard, but IMHO I would expect that all good C++11 implementations would use thread pooling if