If you use a VPS for online and offline apps, you could come across a case where they don't work correctly because of lack of physical memory. This may happen if you try to run a program that requires additional RAM than the amount your package offers, or if you have too many apps and some of them consume all of the memory, leaving no free RAM for the others. Even in case you get a powerful package deal, this may happen if you include more programs on the web server later on, and since it's possible that you shall need just more physical memory, but not higher CPU speeds or more disk space, our company offers a RAM upgrade that you could use without changing your entire plan. That way, you could pay only for the resources which you really need and you shall be able to avoid errors on your Internet sites caused by deficiency of memory and the inability of the Virtual Private Server to load the apps.