In case you use a VPS for online and offline applications, you could come across a situation where they don't operate effectively because of lack of physical memory. This may happen if you try to run a program that requires more RAM than the amount your plan comes with, or if 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 add more programs on the server later on, and since it is possible that you will need just more physical memory, but not higher Processor speeds or more disk space, we provide a RAM upgrade that you can use without changing your whole plan. That way, you could pay just for the system resources which you really need and you can avoid errors on your sites caused by a lack of memory and the inability of the VPS to load the apps.