What is the maximum number of threads available in Asp.net ThreadPool

Just out of curiosity , What is the maximum number of threads available for handling request in asp.net.

And does asp.net releases them for any I/O or database operations so that maximum number of requests can be handled?

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Answers:

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Method 1

It is controlled via machine.config.

configuration > system.web >
processModel

<processModel 
   maxWorkerThreads="num"
   maxIoThreads="num"
   minWorkerThreads="num"
   minIoThreads="num"
   ...
   />

It is set on a per CPU basis. Default for single CPU is 20/20.
http://msdn.microsoft.com/en-us/library/7w2sway1(v=VS.100).aspx

Method 2

In .net 4.0 has it is 250 worker threads per CPU and 1,000 I/O completion threads…

Method 3

To release worker threads for I/O operations, you’ll want to use the async/await pattern. When you “await” an async file operation, the thread will be released back to the ASP.NET thread pool, which is then used to process other requests until your file i/o operation is completed.

http://www.asp.net/mvc/tutorials/mvc-4/using-asynchronous-methods-in-aspnet-mvc-4

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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