The more physical memory your Virtual Private Server has, the more applications you shall be able to run all at once. Some programs require lots of RAM even if nothing else is running on the server, even though they may not demand high Central processing unit speeds or loads of disk space. If your server runs out of memory, it shall stop responding and the websites and the offline applications which you host on it shall not function properly, as their software components shall not load since there will not be any free memory. In this light, we offer a RAM upgrade for our VPS plans, thus if you notice that your machine is close to the limit, you can make the most of this upgrade without upgrading the whole package and paying for system resources which you won't use. This way, you could ensure the proper functioning of your scripts and stop stressing that your site visitors will see errors or will not be able to open your sites at all.