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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