I would not really say it is vital. It is just that you can have many people on the same server but they can each change settings and everything because to them it looks like they are on there own dedicated server but it is really only 1 physical server. Lets say the physical server has 2GB of Ram and has 4 VPS. Then each person may be given 512MB or RAM alloted to them or it may be setup so one person gets more and others get less. Does this make more sense? If not let us know and someone will try to explain it in a different way.

MMeffert you lost me on this one. A VPS needs a minimum guaranteed 256MB of ram. If not as soon as the server gets busy it runs out of ram and starts using swap. And as soon as it runs out of swap, programs start crashing. Not too long after that happens the server stops responding. Once that happens your website is dead in the water. Please dont miss lead our users.

I am not trying to mislead anyone. I hope it did not look like I was. I was just using an example to help them understand it better. I was just using those numbers as examlpes. You could have 4GB of RAM and then each user gets 1GB or 2 get 512MB each and the other two get 1.5GB each. What ever is alloted to them out of the total amount of physical RAM.

Thanks very much for this. I have been wondering for VPS was. I always see it when I am looking for internet connections and other things like that. But I never knew what it actually was. This helped me out alot, thanks again.

Wow, while I was rading all the posts with Vp in them, I had no idea what it was. Now I know, great explanation.