Improved APPC/CPIC Performance on SNA Client Computer

MORE INFORMATION

An update to Snadmod.dll for SNA Server 4.0 is available which improves performance. Instead of closing a client-server connection immediately after the last conversation ends, Snadmod.dll now waits a short period before it closes the LAN connection. The idea is that if the application starts a new conversation within this period, the snadmod.dll can avoid expensive logon validations and resource allocations by reusing the existing connection. The delay is configurable through the following registry parameter.

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

SNA Server Windows NT Client

1. Apply the hotfix.
2. Start the Windows NT Registry Editor (Regedt32.exe) and find the following key:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SnaBase
          \Parameters\ 
   						

3. Add the following entry to this key:

          Value Name: CloseTimeout
          Data Type: REG_DWORD
          Data (Decimal): <value>
   						

   Where value is the number of seconds. If this entry is not specified, the CloseTimeout value internally defaults to 10 seconds.

SNA Server Windows 95 or Windows 98 Client

1. Apply the hotfix.
2. Start the Windows 95/98 Registry Editor (Regedit.exe) and find the following key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SnaBase
          \Parameters\ 
   						

3. Add the following new DWORD value:

          CloseTimeout
          Value Data (Decimal): <value>
   						

   Where value is the number of seconds. If this entry is not specified, the CloseTimeout value internally defaults to 10 seconds.

This update applies to any SNA Server Windows NT, Windows 95, or Windows 98 client which runs an APPC or CPIC application to connect through an SNA Server running on a separate computer. The SNA Server does not need to be updated, and can remain at SNA Server 4.0 or a prior release. If the application is running on the server itself, it may still establish a LAN session to use resources provided by another SNA Server in the subdomain. In this case, this update should be applied to the server (that is, the computer where the application is running).