Why does Exchange Server need so much RAM?

Custom / CUSTOM
April 9, 2011 at 11:51:49
Specs: Windows 7, Q9950 / 8 GB
My best server only goes up to 3.25 GB, even in 64 bit, maybe this server has a Desktop Motherboard. Anyhow, how come exchange server requires a ton of RAM? What if I am running only 2 mailboxes and plan to add more in the future? Can 3.25 GB still suffice?

Can I also make my Domain Controller, the Exchange Server as well without going down to the inferior Windows Small Business Server? Is this really a possibility in Windows Server 2008 R2?


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April 10, 2011 at 09:37:40
SBS inferior? How would you come to that conslusion?

Appears the only question is can you have exchange and dc on the same box.

It is done all the time.

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April 11, 2011 at 21:44:35
I think SBS is okay for what I use it for, but I've always used Windows Server 2003 Enterprise Edition on my server and it did the job, so I felt like Going down to SBS is like going back to XP Home from XP Pro. I used XP Home in 2002 but eversince in 2005 I found out that the home edition is a Windows NT OS, which lacks Domain support, I immidietly ditched it. I switched earlier to XP Pro though! :-)

So, SBS may be the best alternative for me, but back in 2006, when I installed a DC and Exchange on top of it, I was told that it will not work. I never seen a reason why it would be difficult to install Exchange Server 2003 on a Windows Server 2003 DC.

In 2010, I upgraded my DC to Server 2008 and my Exchange Server (The best server I have) is still on a Windows Server 2003 x64, running Exchange Server 2007. It works great with only 3.25 GB of RAM, so I am not sure if I should upgrade it to Server 2008 R2 and run Exchange Server 2010.

I posted this about my terminal server:


Anyways, thanks for your help.


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