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Glossary

Alert noise

Alerts that don't need anyone to act: duplicates, known background errors, bots probing dead URLs, flapping checks.

In Pagerless

Logged rather than sent, and counted in the weekly email.

Alert fatigue
When responders receive so many alerts, many not actionable, that they start ignoring or muting them and miss the ones that matter.
Flapping
A check or alarm that switches between failing and healthy repeatedly in a short time, producing a stream of open and close alerts.

Updated October 22, 2026.

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