The more physical memory your VPS has, the more programs you shall be able to run simultaneously. Some programs require lots of RAM even if nothing else is running on the server, even though they might not require high Central processing unit speeds or a lot of disk space. If your web server runs out of memory, it'll stop responding and the sites and the offline apps you host on it shall not perform properly, as their software components will not load since there will not be any free memory. In this light, we offer a RAM upgrade for our Virtual private server plans, so if you discover that your web server is close to the limit, you may take full advantage of this upgrade without upgrading the whole package and paying for system resources which you won't use. This way, you'll be able to ensure the proper performance of your scripts and stop stressing that your website visitors shall see errors or will not be able to open your websites at all.