IIS 7 on Vista has a limit for concurrent requests (up to 10). I have a Virtual PC on my Vista with Windows Server 2008 installed on it.
IIS 7 on the virtual PC still limits simultaneous requests.
When I run the same application on ASP.NET Development Server, it's ok – there are no limits.
Is the problem in host OS?
How can I tune IIS to process more concurrent requests? It's a must for application because it should handle a lot of concurrent open connections and requests connected with them.
UPD: i've noticed a difference between running app under Vista itself and under the virtual PC.
When running on Vista there is a request limit (10). If there are already 10 long-running requests the following requests hang (they are in a request queue).
When running on the virtual machine something strange happens. I have only 2 long-running requests completed. The following requests (even not long-running) are blocked.
For this test i used self-written load testing script. It pushes a lot of requests at a time.
Any ideas? How to test the app on IIS?
Best Answer
I will say the most likely culprit is Microsoft restricting the number of simultaneous inbound connections to their consumer-grade operating systems. We can't have you using them as servers, now! :)
Are you getting
500 Server Busyerror on your virtual server, or are requests being rejected at the network level? The answer to that will answer your question.