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Amazon CloudWatch now supports warm-up periods for alarms

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AWS·Sep 1, 2026, 08:00 AMFeatureAI-assisted summary

Summary

Added warm-up period configuration for metric and log alarms to delay evaluation after creation
Allows specifying a duration (1‑2880 minutes) or auto‑start when enough data is available, reducing false alarms during service startup
Configurable via the WarmUpConfiguration parameter; no extra charge beyond standard CloudWatch alarm pricing

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Official source Last checked Sep 20, 2026, 3:04 PM

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