OPENGL Screen Savers May Degrade Server Performance (121282)
The information in this article applies to:
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0
This article was previously published under Q121282 SUMMARY
If OPENGL screen savers are used on a Windows NT Server, network
server performance (the Server's responsiveness to clients) may be degraded
while the screen saver is running.
Performance degradation is due to the number of calculations and memory
needed to produce the screen saver image. A decrease in performance of the
computer has been observed on Windows NT servers with SQL Server and SNA
Server installed. If a screen saver is needed, change it to a non-3D/OpenGL
screen saver.
NOTE: This behavior has also been seen when using the Marquee screen saver
with a very large point size set for the text (although the dialog box only
shows numbers up to 72, the Marquee screen saver allows a point size of up
to 200).
MORE INFORMATION
OPENGL screen savers use a great deal of CPU time because 3-Dimensional
graphics are complex and require more computational time than the BitBlt
graphics which standard screen savers use. Other services, such as the
Server Service, must wait until the screen saver computations are complete
or until the screen saver uses up its full CPU time slice. With a slower
processor the performance degradation is more evident. For the fastest
server response to network clients, use the Blank Screen screen saver.
| Modification Type: | Minor | Last Reviewed: | 4/28/2004 |
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| Keywords: | kbusage KB121282 |
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