In case you use a VPS for online and offline programs, you could come across a situation where they don't work adequately due to insufficient physical memory. This can take place if you try to run an application which requires more RAM than the amount your plan offers, or if you have too many programs and some of them consume all the memory, leaving no free RAM for the others. Even in case you get a powerful package, this could happen if you add more applications on the server in the future, 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'll be able to use without changing your entire plan. That way, you could pay only for the resources which you really need and you shall be able to avoid errors on your sites caused by a lack of memory and the inability of the Virtual Private Server to load the programs.