If you use a Virtual Private Server for online and offline apps, you could come across a case where they don't operate correctly because of lack of physical memory. This may occur if you try to run an application that requires more RAM than the amount your plan includes, or in case you have too many apps and some of them consume all the memory, leaving no free RAM for the others. Even if you get a powerful package, this can happen if you include more apps on the hosting server in the future, and since it's possible that you will require just more physical memory, but not higher CPU speeds or more disk space, we provide a RAM upgrade that you may use without changing your entire plan. That way, you can pay only for the system resources which you really need and you'll 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 applications.