The more physical memory your VPS has, the more applications you shall be able to run concurrently. Some applications require loads of RAM even when nothing else is running on the hosting server, even though they might not require high CPU speeds or lots of disk space. In case your hosting server runs out of memory, it shall stop responding and the sites and the offline applications which you host on it will not work adequately, as their software components will not load since there will not be any free memory. In this light, we offer a RAM upgrade for our VPS packages, so if you notice that your server is close to the limit, you may make the most 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 operation of your scripts and stop concerning that your site visitors will see errors or will be unable to open your websites at all.