how many concurrent requests settings for IIS 8.5

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How many concurrent requests can be executed in IIS 8.5?

I could not find proper values for how many concurrent requests can be executed in IIS 8.5

As I found out below 2 different values:

  1. By default IIS 8.5 can handle 5000 concurrent requests as per MaxConcurrentRequestsPerCPU settings in aspnet.config

  2. In machine.config, the maxconnection is 2 per CPU as default. So if have 6 core CPU then 12 concurrent requests are possible by default.

So I would like to know that Point 1 is right or Point 2 is right for concurrent requests for IIS 8.5.

python-requests concurrency iis
3 Answers

According to this article there is also limitations when running on different Windows versions:

https://blogs.iis.net/owscott/windows-8-iis-8-concurrent-requests-limit

Max concurrent requests

Windows 8:

3 requests

Windows 8 Professional:

10 requests

Windows RT:

N/A since IIS does not run on Windows RT

I assumed (and tested on Windows 10 Home Edition) that on 8 and above this limitations still exists.

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