The more physical memory your VPS has, the more apps you shall be able to run all at once. Some apps require loads of RAM even if nothing else is running on the web server, even though they may not demand high Central processing unit speeds or plenty of disk space. In case your server runs out of memory, it'll stop responding and the sites and the offline applications which you host on it will not perform adequately, as their software components won't load since there won't be any free memory. In this light, we offer a RAM upgrade for our Virtual private server plans, thus if you notice that your server is close to the limit, you may take advantage of this upgrade without upgrading the whole plan and paying for system resources that you won't use. This way, you can guarantee the proper operation of your scripts and stop stressing that your visitors shall see errors or will not be able to open your sites at all.