If you use a VPS for online and offline applications, you might come across a case where they don't function adequately due to lack of physical memory. This can occur if you try to run an app that requires more RAM than the amount your plan comes with, or in case you have too many applications 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 at some point, and since it's possible that you will require only more physical memory, but not higher Central processing unit speeds or more disk space, we offer a RAM upgrade that you may use without changing your entire plan. Thus, you can pay only for the system resources that you need and you shall be able to avoid errors on your sites caused by deficiency of memory and the inability of the VPS to load the applications.