Netdata

Netdata is a free, open-source real-time performance monitoring tool that can detect anomalies and create incident notifications. It collects per-second metrics on CPU, RAM, disk, network, and more, visualizing them in interactive dashboards. When thresholds are breached, Netdata triggers alerts via email or chat. It suits sysadmins wanting an ultra-detailed monitoring solution for diagnosing incidents quickly, though it’s not a full ITSM system, but can tie into an incident workflow.