You also need to review source code of the web app to identify other possible threading issues. Hi, I would love to do that. I cannot do that extensive changes at the moment however! Do you know of any other ways of actually increasing the number of threads that are allowed? I just cannot seems to increase the throughput. No typical threading issues almost all require code change to remedy. There is no much room to discuss further. Wierd that I cannot increase the available thread in any other way, but I take your word on it.
Out of curiosity, how did you previously manage to handle larger load when async programming was not that widespread and many of the available API:s in. NET was not written using any async programming model?
A couple of time consuming SQL queries and the whole request pipeline is blocked? Due to various reasons, ASP. NET was not initially designed to be high performance. That's why ASP. NET Core has been redesigned from the scratch, and has been proven to be much better an option for new projects.
I rather not comment further, as that's lengthy. There are articles over the internet on such topics if you want to explore further. Add a comment. Active Oldest Votes. Improve this answer. Excellent answer and thanks for your feedback! We worked around the issue by asking the integration clients all integration was made within the enterprise to spread out the calls to the "heavy" endpoints.
Will absolute look into your suggestion! Cannot seem to set your answer as the answer for my question too low reputation? This might reduce queuing and improve response times. On a site with minor blocking that is, the queue only occasionally reaches the value of the AspRequestQueueMax Metabase Property , increasing the threads can have a dramatic effect; in fact, it might eliminate all ASP queuing, because there are always enough threads to handle the blocking and nonblocking requests. You are only setting the maximum possible threads.
If the is a recurrent process and you need to have asp. This should help you understand the different config options and what each does: guidanceshare.
The content you requested has been removed. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. General for IIS 5. Sign in to vote. Tuesday, September 30, PM. Hope this helps User posted It appears the new threads are created when the requests executing gets above the minimum, upto the max set. Friday, October 3, PM. Understanding how this works will help you determine how to configure your ASP.
Net application for optimal performance. That means your ASP. Net worker process actually contains two thread pools: the worker thread pool and the IOCP thread pool. Naturally, these pools have different purposes. When you use methods like Task. Run , TaskFactory. StartNew , and ThreadPool. QueueUserWorkItem , the runtime takes advantage of worker threads for processing.
Note too that each application domain has its own thread pool. Net thread pool starts injecting new threads whenever the number of busy threads becomes equal to the number of configured minimum threads in the thread pool. The default value of the minimum setting, which is the minimum number of both worker and IOCP threads, is determined by the number of processors in your system.
Hence, if your system has four cores, you would have four worker threads and four IOCP threads by default. Net thread pool then injects additional worker threads on demand if existing threads are utilized and there is still work to be done.
By the same token, if the demand for resources falls, the thread pool will begin taking threads away. Executing the following code snippet would display the number of logical processors in your system and the minimum number of worker and IOCP threads available.
Net thread pool manages threads using its built-in heuristics. The strategies adopted include starvation avoidance and a hill-climbing algorithm. In the former case, the. Net thread pool continues to add worker threads if there is no visible progress on the queued items.
In the latter case, the. Net thread pool tries to maximize the throughput using as few threads as possible. Net thread pool injects or removes threads at intervals of milliseconds or as a thread becomes free, whichever comes first.
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