The more physical memory your VPS has, the more apps you shall be able to run simultaneously. Some applications require lots of RAM even when nothing else is running on the hosting server, even though they might not demand high CPU speeds or loads of disk space. If your server runs out of memory, it'll stop responding and the websites and the offline programs which you host on it won't work adequately, 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 solutions, thus if you detect that your web server is close to the limit, you could take advantage of this upgrade without upgrading the whole package and paying for system resources that you won't use. That way, you can guarantee the proper performance of your scripts and stop concerning that your visitors shall see errors or will not be able to open your Internet sites at all.