Whenever an app is executed on a server, it is loaded into the physical memory. If you run a resource-demanding script, or if you simply add more scripts on your Internet sites and you get lots of visitors, you could encounter a case where your VPS has insufficient memory to run all the applications and freezes as a result, which means your Internet sites will stop working correctly and that the visitors will start seeing error messages. To avoid this kind of a scenario, you can take advantage of the RAM upgrade that we are offering and increase the amount of physical memory for your use without changing the entire plan. That way, you'll be able to pay just for the system resources which you actually need and not for additional disk space or higher CPU speeds that you won't really use, for example. With the upgrade, you can guarantee the sleek operation of your websites, which also means a better experience for your visitors.