DevOps
Observability Debt: The Alerts Nobody Reads Anymore
Every unread alert is a small tax on the next real incident. Most teams are paying it without noticing.
Alert fatigue accumulates the same way technical debt does: one reasonable-seeming addition at a time, until the signal-to-noise ratio quietly collapses.
How it actually happens
Every incident postmortem tends to add an alert for the exact failure that just happened. Almost none of them get removed once the underlying risk is fixed, so the alert list only ever grows, and on-call engineers learn — correctly — that most pages do not require action.
- Audit alert-to-action ratio quarterly: what fraction of pages actually led to a change?
- Retire alerts tied to root causes that have since been fixed.
- Separate “wake someone up” alerts from “worth reviewing Monday” alerts explicitly.
The payoff
A shorter, higher-precision alert list gets responded to faster than a comprehensive one, because on-call engineers trust it. Comprehensive and ignored is worse than incomplete and trusted.