The more physical memory your VPS has, the more applications you will be able to run simultaneously. Some pieces of software require loads of RAM even if nothing else is running on the server, even though they may not demand high CPU speeds or lots of disk space. If your server runs out of memory, it shall stop responding and the websites and the offline apps you host on it shall not perform 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 Virtual private server plans, thus if you discover that your web server is close to the limit, you'll be able to take full advantage of this upgrade without upgrading the whole package and paying for system resources that you will not use. In this way, you'll be able to guarantee the proper operation of your scripts and stop worrying that your site visitors shall see errors or will not be able to open your sites at all.