Web not accessable while uploading files over 50+ connection

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ASP.NET

WCF

service

webservice

, +

I wrote svc service to upload a file to server, the service run in streamed mode and i can chunk file in any size before uploading. My test run is to upload files (all 1Gb+) over 50 + test connections (over 50 Gb Data). To do that i created a console application that consumes that file service (svc) and uploads a file given in command line argument. Then i ran this exe in command line tool 50 times using shell script.

It created 50+ connections to my web server and start uploading file, all good.

Now i see that 1) all files being piling in .Net temp folders and being moved to final location slowly. 2) CPU and Memory is still well under 30% but my website become unresponsive and not opening any page. (wondering why as outgoing bandwidth should be free as only incoming is used while downloading data) 3) I cant make further connections to upload any more files.

Any one got any experience here ??