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Speed up your Lotus Notes performance by tuning the JVM

January 14, 2011 3 Comments

I posted this a while back on my internal blog at IBM and it’s clearly one of the most read entries so I’d thought I would share it with everyone, please spread the info.
Lotus Notes uses Java Virtual Machine (JVM) for processing of Lotus Notes applications and plugins. 
IBMs Lotus Notes client configuration has a standard value that defines how many megabytes of RAM Lotus Notes can maximally use for JVM. This value is for PCs with above 1 GB RAM initially set too low, as it should be approx. 1/3 of the RAM of the PC (default value = 256 MB, but should be 768 MB).
How to change this:
1.) Shut down Lotus Notes. 
- To be sure no processes are running in the background, run this command from Start -> Run
Type C:\notes\nsd.exe -kill
2.) Find the file “” in this folder (depending on Lotus Notes version):
In Lotus Notes version 8.5.x:
3.) Open the files in a texteditor like notepad.  
4.) You will now see a text surrounded by a lot of pound signs ####
The first ‘property’ after the last # sign is: 
This is where you must change 256 MB RAM to 768 RAM (if you have 2GB RAM installed which is IBM standard)
5.) Save your changes and close the file.
Now start Lotus Notes and hopefully you will find it a lot faster already at password prompt and afterwards for opening workspace, mailbox etc.

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Comments (3)

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  1. Ramy El Serwy says:

    Thanks, it will be very useful

  2. Inspi says:

    Thank you very much.
    Even lotus notes feels faster. Keep giving these nice tips

  3. Thomas Bahn says:

    With Notes 9 I already have vmarg.Xmx=-Xmx1024m in this file.

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