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