Netdata alternatives: measure visibility under load and loss

For Netdata alternatives, run the candidate on a representative host and observe both normal load and failure.

• Compare auto-discovered metrics, collection overhead, and update interval.
• Trigger safe CPU, memory, and disk pressure; inspect alerts and dashboards.
• Stop collection and confirm the absence of data is signaled.
• Check remote access, authentication, retention, and multi-host navigation.
• Export metrics or alerts into the team's existing incident workflow.

Monitoring that silently stops is worse than a noisy graph. Test agent health as a first-class signal.