Right now I'm running Windows Server 2003 on a VPS with 640mb RAM and it works fine. I would like to upgrade OS to Windows Web Server 2008 or Windows Web Server 2008 R2.
I understand that it is difficult to say how much RAM is needed, but can you make a comparison between 2003 and the two new 2008 versions?
RAM on VPS is by far the most expensive item, so I wonder if I can get similar performances with 1GB and 2008 or 2008R2 compared to 640MB and 2003.
Basically I run IIS, SQL Server and MailEnable.
Let's try to say this in another way: Do 2008 and/or 2008 R2 need much more RAM than 2003? For example, with a similar situation (same DB, same web sites and programs running etc), can I say that I need the same amnount of RAM? 1.5x? 2x? How much more consuming is 2008 vs 2003 in terms of RAM?