States, coverage and availability

A confirmed failure is different from a missing observation. Read coverage alongside availability.

Interpret a state

• Pending: no reading yet.
• Up: the service meets its configured conditions.
• Degraded: a warning condition was detected.
• Verifying: a failure is awaiting confirmation.
• Down: the failure meets the confirmation policy.
• Unknown: no valid check is available; inspect its cause.
• Paused: checks were stopped.
• Maintenance: a maintenance window is active.

Read the percentage with its coverage

Availability uses elapsed time between state transitions. Maintenance and unknown time are excluded from the measured period. A perfect percentage of watched time does not prove every minute had data.

When an agent is missing

Check its connection, capabilities and allowed destinations before concluding that all services on its network failed. Unknown never proves a service failure by itself.