We’ve built a lot of amazing things into the open-source Netdata monitoring system. But, no matter how far we’ve come, we’ll always be proud of how little RAM it uses.
Right now, Netdata stores metrics in your system’s RAM using a ridiculously efficient database. It only saves or loads historical metrics from disk when you restart it. With this system, Netdata can be both low-resource and exhaustive in its collection of real-time metrics.