Whenever an app is executed on a hosting server, it's loaded into the physical memory. In case you run a resource-demanding script, or if you simply add more scripts on your sites and you get loads of visitors, you may encounter a case where your VPS has insufficient memory to run all the programs and freezes as a result, which means your sites will stop functioning adequately and that the visitors shall 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 available without changing the entire plan. This way, you'll be able to pay only for the system resources that you actually need instead of for additional disk space or higher CPU speeds that you shall not really use, for example. With the upgrade, you can guarantee the flawless performance of your Internet sites, which also means a better experience for your website visitors.