If you use a VPS for online and offline apps, you could come across a case where they don't operate correctly because of lack of physical memory. This could happen if you try to run an app that requires additional RAM than the amount your package deal comes with, or in the event that you have too many applications and some of them consume all of the memory, leaving no free RAM for the others. Even if you get a powerful package, this may happen if you include more applications on the server at some point, and since it is possible that you will need only more physical memory, but not higher Processor speeds or more disk space, we offer a RAM upgrade which you can use without changing your entire plan. That way, you could pay only for the resources that you really need and you'll be able to avoid errors on your websites caused by a lack of memory and the inability of the Virtual Private Server to load the apps.