threadpool

问题 TPL uses Task Schedulers to coordinate tasks. According to official document, default task scheduler uses Thread Pool, but if TaskCreationOptions.LongRunning option is presented then it will create a dedicated thread for that task (A). Question: As of now MSDN documents for Visual Studio 2010 are not ready and current online MSDN is not finalized; does anyone knows if (A) is true or false? 回答1: Yes, LongRunning forces the creation of a new thread outside the pool. Here's some pseudo

问题 My multithreading concepts are weak and trying to learn. In Java what I know is, we can\'t call a thread more than once: Thread t = new Thread; //Some Runnable t.start(); t.start(); //Illegal and throw Exception at runtime. As far as I know, it throws exception when you call t.start() again because the associated stack for the thread is destroyed once it goes out of run() method and you are trying to initialize things again. In that case, what I know about thread pool is, it gives better

问题 I\'m currently writing a simple webserver in C for a course I\'m doing. One requirement is for us to implement a thread pool to handle connections using pthreads. I know how I would go about doing this roughly(calling accept in a main thread and passing the file descriptor to a freee thread), however my friend suggested an alternate method than the one I had in mind: creating all my threads up front, and getting them all to loop forever on a call to accept. The idea being that accept will

问题 i just want to know How to increase number of threads in tomcat thread pool ? and what number to set the max too, i don\'t know what\'s appropriate ? 回答1: Sounds like you should stay with the defaults ;-) Seriously: The number of maximum parallel connections you should set depends on your expected tomcat usage and also on the number of cores on your server. More cores on your processor => more parallel threads that can be executed. See here how to configure... Tomcat 9: https://tomcat.apache

问题 what is difference between the below ThreadPool.QueueUserWorkItem vs Task.Factory.StartNew If the above code is called 500 times for some long running task does it mean all the thread pool threads will be taken up? Or will TPL (2nd option) be smart enough to just take up threads less or equal to number of processors? 回答1: If you're going to start a long-running task with TPL, you should specify TaskCreationOptions.LongRunning, which will mean it doesn't schedule it on the thread-pool. (EDIT:

问题 In a Spring web application I have several DAO and service layer beans. One service layer bean has annotated @Async / @Scheduled methods. These methods depend on other (autowired) beans. I have configured two thread pools in XML: <bean id=\"taskExecutor\" class=\"org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor\"> <property name=\"corePoolSize\" value=\"2\" /> <property name=\"maxPoolSize\" value=\"5\" /> <property name=\"queueCapacity\" value=\"5\" /> <property name=\

问题 Can someone please explain what is thread per request and thread per connection? Which model do servlets work on? How threads are allocated to handle HTTP requests? Is it thread/request or connection? And let\'s say if I want to perform a time consuming task in my Servlet \'s doGet() method asynchronously, I start a new thread using Java executors so that lengthy calculations are done in a separate thread and response is sent right away. Now does that ensure that I have freed the thread which

问题 Scenario : I have a sample application and I have 3 different system configuration - - 2 core processor, 2 GB RAM, 60 GB HHD, - 4 core processor, 4 GB RAM, 80 GB HHD, - 8 core processor, 8 GB RAM, 120 GB HHD In order to effectively exploit the H/W capabilities for my application, I wish to configure the no. of threads at the application level. However, I wish to do this only after a thorough understanding of system capabilities. Could there be some way(system/modus/tool) to determine the

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Looking for some sample code (C#) for a simple thread pool implementation. I found one on codeproject, but the codebase was just huge

问题 I have looked into several \'too many clients\' related topic here but still can\'t solve my problem, so I have to ask this again, for me specific case. Basically, I set up my local Postgres server and need to do tens of thousands of queries, so I used the Python psycopg2package. Here are my codes: import psycopg2 import pandas as pd import numpy as np from flashtext import KeywordProcessor from psycopg2.pool import ThreadedConnectionPool from concurrent.futures import ThreadPoolExecutor df =