The more physical memory your VPS has, the more programs you shall be able to run simultaneously. Some apps require lots of RAM even when nothing else is running on the server, even though they might not require high CPU speeds or lots of disk space. In case your server runs out of memory, it'll stop responding and the Internet sites and the offline programs that you host on it shall not work adequately, as their software components won't 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 detect that your 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. In this way, you'll be able to ensure the proper performance of your scripts and stop stressing that your site visitors shall see errors or will be unable to open your sites at all.