Domino 32 bit vs 64 bit – what’s the difference?


I have been absent for a while but with good reason – a new project that keeps me VERY busy.

Being busy though also has it’s advantages though, since it also means that I get to be exposed to allot of new things and learn more and more.

So, 32 bit vs 64 bit – what is the difference? Well, first of all let’s state that I am talking about Domino on Windows. To run 64 bit Domino you require 64 bit OS. What that also means is that any add-in tasks that you want to run inside of Domino will also need to be 64 bit – 32 bit 3rd party processes will not run on a 64 bit Domino/Windows server.

What is it that you gain? Well, the main gain you get is shared addressable space. Under 32 bit domino the maximum shared address space you get is 2 GB. that means that any add-in task you run (such as an anti virus product etc.) has a maximum shareable shared address space of 2 GB. On a busy server that can can be tight. The reason I know that is that in the first week I started my present project we saw what happens to a server that runs out of available shared address space – it will will present you with a crash and a wonderful NSD file ….

Now, when you change to 64 bit you now double your shared addressable space to 4 GB. this gives you PLENTY of space for a busy server (user sessions, applications, third party add-ins, etc.).

I will blog more about this topic in the near future and hopefully be able to shed some more light on this interesting subject.