Reducing the TCP window size
We set our Win2K3 server to have a Tcpip\Parameters\TcpWindowSize of 48K. Our application can read a separate registry setting and do a setsocketopt(SO_RCVBUF) to raise of lower the window size of the application.Raising is always good. Lowering is good until you go below 16284. Then, it reverts to 48K (as seen in a wireshark trace).We need to reduce the window size to work over a slow pipe and not take all the bandwidth.Reducing TcpWindowSize to 12K allows one to set the value below 16384. I'm not sure where the value would revert back to 12K.Is this a bug? Is there someway to get the application to use a value less than 16384 while keeping our old 48K TcpWindowSize?
June 6th, 2008 8:13pm

Have you considered QoS on the pipe?
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June 17th, 2008 3:33pm

DSL works better on the pipe....
June 8th, 2012 8:31pm

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