Good alert thresholds balance fast detection with a manageable on-call experience so your team responds quickly without burning out.
Too-sensitive thresholds create noise and fatigue, while too-loose thresholds can delay detection. Aim for a middle ground and adjust over time.
Start with conservative defaults for new services, then tune thresholds based on how critical each service is and how often it changes.
After each incident or noisy alert, review what happened and tweak thresholds, intervals, or escalation rules to improve signal quality.
Different services justify different thresholds. Mission-critical APIs may need fast, strict thresholds, while internal tools can tolerate more variation.