The more physical memory your VPS has, the more programs you'll be able to run simultaneously. Some pieces of software require plenty of RAM even if nothing else is running on the server, even though they might not demand high Processor speeds or loads of disk space. If your server runs out of memory, it'll stop responding and the websites and the offline applications you host on it shall not perform effectively, as their software components won't load since there will not 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 could take full advantage of this upgrade without upgrading the whole package and paying for resources that you will not use. This way, you could ensure the proper performance of your scripts and stop concerning that your visitors shall see errors or won't be able to open your sites at all.