The more physical memory your VPS has, the more programs you shall be able to run at the same time. Some programs require a lot of RAM even if nothing else is running on the server, even though they may not demand high CPU speeds or plenty of disk space. In case your web server runs out of memory, it will stop responding and the websites and the offline apps you host on it won't work properly, as their software components shall not load since there won't be any free memory. In this light, we offer a RAM upgrade for our VPS plans, thus if you detect that your machine is close to the limit, you can make the most of this upgrade without upgrading the whole package and paying for system resources which you won't use. That way, you could guarantee the proper operation of your scripts and stop worrying that your site visitors will see errors or will not be able to open your Internet sites at all.