Tip

"Registry Value Largesystemcache Is Currently Set..." On R4 Nt Server

"Registry Value LargeSystemCache is Currently Set..." on R4 NT Server

Problem:

A customer starts a Notes 4.0 server running on a Windows NT 4.0 platform and
the following informational messages are displayed on the server console and in
the log file:

Informational: The registry value
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory
Management\LargeSystemCache
is currently set to 1. For better server performance, change the setting to 0.

Informational: The registry value
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\PriorityControl\Win32Priorit
ySeparation
is currently set to 2. For better server performance, change the setting to 0.

Solution:

These messages are essentially asking for "LargeSystemCache" and
"Win32PrioritySeparation" settings to be changed in the Registry.

These changes can be made by using the Registry Editor (REGEDT32.EXE found in
the WINNT35\SYSTEM32 directory). These changes can also be made by using the
Graphical User Interface (GUI).

To change the LargeSystemCache setting:

1. Open the Control Panel and open Network.

2. From the list of Installed Network Software, choose Server and then click
Configure. This opens the Server Optimization settings dialog box.

3. Select "Maximize Throughput for Network Applications." This setting changes
the Registry value to zero. By default, "Maximize Throughput for File Sharing"
is selected, and yields a Registry value of one. This would result in memory
being allocated for an unlimited number of connections. By selecting "Maximize
Throughput for Network Applications", memory is again allocated for an
unlimited number of connections, but less memory is set aside for cache.
"Minimize Memory Used" accepts up to ten connections and "Balance" allows for
64 connections.


To change the Win32PrioritySeparation setting:

1. Open the Control Panel and open System.

2. Select the Tasking button to open the Tasking dialog box.

3. Select "Foreground and Background Applications Equally Responsive." This
option changes the Registry value to zero. By default, "Best Foreground
Application Response Time" is selected, and yields a Registry value of two.
This would result in any window having a priority two levels higher the Notes
Server window if the Notes Server window were in the background. For instance,
any time the client on the server was being utilized, the Notes Server would
suffer a performance degradation. The amount of degradation would be linked to
what application was in the foreground. Similarly, if "Foreground Application
More Responsive than Background" is selected (Registry value of one), any
window would receive a priority one level higher than the Notes Server window
if the Notes Server window were in the background.

This was first published in November 2000

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