Monitoring & Observability

Alerting & On-call

Alert on symptoms, not noise.

30 min read intermediate 3 objectives

Status

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What you will learn

  • Alert on user-facing symptoms
  • Reduce alert fatigue
  • Route to on-call

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The basics, in plain English

An alert is an automatic message that warns you when something is wrong, so you do not have to stare at dashboards all day. On-call means being the person responsible for answering those alerts during a shift. Good alerts wake you only for things that truly matter.

Alert
An automatic notification that fires when a metric crosses a danger line.
Threshold
The limit that, once crossed, triggers an alert.
On-call
Taking turns being the person who responds when alerts fire.
Paging
Urgently contacting the on-call person, often by phone, for serious problems.
Alert fatigue
Getting so many noisy alerts that you start ignoring them, which is dangerous.
Escalation
Passing an unanswered alert to the next person up the chain.
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Good alerts

Alert on what users feel, not every blip. Every page should be actionable. Noisy alerts cause fatigue and missed real incidents.

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