WCF Max Instances seems to be limited to 10

Question

I have a simple WCF service hosted in IIS7.5 exposed over a wsHttp binding using message security and InstanceContextMode.PerCall

I have a simple UI that spins up a

Answer 1

Are you running the client and server on the same machine? Then they might be fighting for available threads.

If you are running on a different PC, please ensure you have done the following config changes on both client and server.

http://www.codeproject.com/KB/webservices/quickwins.aspx

It is possible that the client is not generating more than 10 requests to the same server. So, please try the above configs first on both client and server.

And of course, you must have a Windows Server. Otherwise it will be the IIS limit on Windows 7.