The more physical memory your VPS has, the more applications you'll be able to run concurrently. Some applications require lots of RAM even if nothing else is running on the web server, even though they might not demand high CPU speeds or lots of disk space. In case your server runs out of memory, it will stop responding and the Internet sites and the offline programs that you host on it shall not function properly, as their software components will not load since there won't be any free memory. In this light, we offer a RAM upgrade for our VPS plans, thus if you discover that your web server is close to the limit, you may take full advantage of this upgrade without upgrading the whole plan and paying for system resources which you won't use. That way, you'll be able to guarantee the proper functioning of your scripts and stop concerning that your site visitors shall see errors or won't be able to open your sites at all.