If you use a VPS for online and offline apps, you could come across a situation where they do not operate adequately due to lack of physical memory. This may occur if you try to run an app that requires more RAM than the amount your plan provides, or if you have too many apps and some of them consume all of the memory, leaving no free RAM for the others. Even if you get a powerful package, this could happen if you include more applications on the server later on, and since it is possible that you will need simply more physical memory, but not higher Processor speeds or more disk space, our company offers a RAM upgrade that you could use without changing your whole plan. In this way, you may pay only for the system resources that you need and you'll be able to avoid errors on your sites caused by insufficient memory and the inability of the Virtual Private Server to load the apps.