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BlackBerry Enterprise Server for IBM Lotus Domino
Technical Note: Validating the BlackBerry Enterprise Server on 64-Bit Windows Server 20032 of 4
Overview
®
®
®
In an IBM
Lotus Notes
environment, the BlackBerry
Enterprise Server process (nbes.exe)
®
®
®
runs as a task on an IBM
Lotus
Domino
server. To maintain stability and performance, the
BlackBerry Enterprise Server task must be able to access sufficient virtual memory.
®
On a 32-bit Windows
operating system, 32-bit applications can address up to 2 GB of virtual
memory. If a process tries to address memory beyond the 2 GB limit, the process stops
responding; however, in a 64-bit Windows environment, a 32-bit application that is large-address
aware (that is, built with the /LARGEADDRESSAWARE:YES linker flag) can address up to 4 GB
of virtual memory.
BlackBerry Enterprise Server versions 4.1 SP4 and later are large-address aware and can run on
®
a 64-bit version of Windows Server
as a task on a 32-bit Lotus Domino server that is also large-
address aware. Lotus Domino versions 7.0.1 and later are large-address aware.
Testing BlackBerry Enterprise Server version 4.1 SP6 in 32-bit and
64-bit environments
This technical note verifies that Research In Motion has tested the large-address aware feature of
BlackBerry Enterprise Server version 4.1 SP6 and has validated that virtual memory usage can
exceed 2 GB. For the validation, large email messages (approximately 4 MB and 22 MB in size)
were sent to 2000 BlackBerry Enterprise Server users at a steady rate. The virtual memory of the
BlackBerry Enterprise Server process (nbes.exe) reached over 2.7 GB. In all cases, the
BlackBerry Enterprise Server process stopped responding in the 32-bit environment, but it
functioned in the 64-bit environment.
Monitoring virtual memory
You can monitor virtual memory usage using the Windows Performance Monitor or other tools
that permit you to view the <server>\<process>\Virtual Bytes counter.
If your computer's virtual memory usage is close to the 2 GB limit, you can upgrade the 32-bit
Windows operating system that the BlackBerry Enterprise Server runs on to a 64-bit operating
system. You must make sure that you run Lotus Domino versions 7.0.1 or later as a 32-bit
application on the BlackBerry Enterprise Server. Lotus Domino versions 8.0.1 or later have been
tuned to use less virtual memory. IBM supports the use of a mixed-mode environment in which
both 32-bit and 64-bit Lotus Domino version 8 servers can operate.
References
For more information about IBM Lotus Domino memory usage, visit
http://www-
1.ibm.com/support/docview.wss?rs=203&uid=swg27008849#Domino%20Server%20Memory%20
Resources.
For more information about memory limits for Windows releases, visit
http://msdn.microsoft.com/en-us/library/aa366778.aspx.
For more information about Lotus Domino version 8 (32-bit and 64-bit comparison), visit
http://www.ibm.com/developerworks/lotus/library/domino8-64bit/.
Last saved: 16/10/2008
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