The more physical memory your VPS has, the more applications you'll be able to run simultaneously. Some pieces of software require loads of RAM even when nothing else is running on the server, even though they might not require high CPU speeds or plenty of disk space. In case your server runs out of memory, it'll stop responding and the sites and the offline apps you host on it won't function properly, 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 VPS plans, therefore if you discover that your machine is close to the limit, you can take full advantage of this upgrade without upgrading the whole package and paying for resources which you won't use. This way, you'll be able to guarantee the proper operation of your scripts and stop worrying that your website visitors will see errors or won't be able to open your websites at all.