Scalability issue when using outgoing asynchronous web requests on IIS 7.5

Question

A bit of a long description below, but it is a quite tricky problem. I have tried to cover what we do know about the problem in order to narrow down the search. The question

Answer 1

Since asynchronous requests hold up the tcp sockets for longer, maybe you need to look at maxconnection property within connection management in your web.config? Please refer to this link: http://support.microsoft.com/default.aspx?scid=kb;en-us;821268

We faced similar problem and tuned this parameter to fix our issue. Maybe this will help you.

Edit: Also, lots of TIME_WAITs indicate a connection leak within the code based on past experience. Possible causes: 1) Not disposing connections used. 2) Incorrect implementation of connection pooling.