If you use a Virtual Private Server for online and offline apps, you may come across a scenario where they don't work effectively as a result of lack of physical memory. This may happen if you try to run an application which requires additional RAM than the amount your plan provides, or in case 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 plan, this could happen if you add more programs on the hosting server at some point, and since it is possible that you'll need only more physical memory, but not higher CPU speeds or more disk space, our company offers a RAM upgrade that you could use without changing your entire plan. This way, you can pay just for the 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.