Optimize the Windows NT TCP/IP Window Size

Posted On 2007-05-03 by FortyPoundHead
Keywords: Optimize the Windows NT TCP/IP Window Size
Tags:  Windows NT Windows 2000
Views: 1589

This parameter determines the maximum TCP receive window size offered by the system. The receive window specifies the number of bytes a sender may transmit without receiving an acknowledgment.
In general, larger receive windows will improve performance over high delay, high bandwidth networks. For greatest efficiency, the receive window should be an even multiple of the TCP Maximum Segment Size (MSS).
Reducing the TCP Window size effectively causes an acknowledgment to be sent to the sender for data received sooner. This will lower the possibility that the sender will time out while waiting for an acknowledgment. However it will also increase the amount of network traffic and cause slower throughput.
Key: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
Value Name: TcpWindowSize
Data Type: REG_DWORD
Data: 0 - 0xFFFF (default = 8760 for Ethernet)

More Info: http://support.microsoft.com/support/kb/articles/q140/5/52.asp

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