The more physical memory your VPS has, the more apps you will be able to run at the same time. Some applications require plenty of RAM even when nothing else is running on the web server, even though they might not require high CPU speeds or loads of disk space. In the event your server runs out of memory, it shall stop responding and the websites and the offline applications that you host on it won't work effectively, 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 VPS solutions, so if you notice that your web server is close to the limit, you could make the most of this upgrade without upgrading the whole plan and paying for system resources which you won't use. This way, you'll be able to ensure the proper functioning of your scripts and stop stressing that your site visitors will see errors or won't be able to open your Internet sites at all.