Performance Decrease Transmitting Data over the Network

• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server, Enterprise Edition version 4.0
• Microsoft BackOffice Small Business Server versions 4.0, 4.0a
• Microsoft Windows NT Server version 4.0, Terminal Server Edition

SYMPTOMS

The TransmitFile() Win32 API call reads the file data directly from the file system cache and sends it out over the wire. However, during periods of stress, applications that use this API to transfer files across the network may see that the transfer is not as fast when there are less than 4 KB streams of data being transmitted.

CAUSE

Windows NT is reading 4 KB at a time as opposed to larger (and more efficient) units.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: smallbiz

Keywords : NT4SP4Fix kbbug4.00 SBS kbfix4.00.sp4
Version : WinNT:4.0,4.0a
Platform : winnt
Issue type : kbbug