An app publishes custom metrics to CloudWatch for per-second-resolution monitoring of a latency-sensitive path. Which put-metric option enables 1-second granularity?
A.Standard resolution (60-second) — the only option
Standard is 60s — but high resolution exists for custom metrics.
B.High-resolution metrics (StorageResolution=1)
Correct. StorageResolution=1 = 1-second granularity.
C.CloudWatch Logs metric filters
Metric filters derive metrics from logs — not per-second publishing.
D.Detailed monitoring
'Detailed monitoring' is EC2's 1-minute option — different thing.
Why this answer
Custom metrics support high resolution (1-second) via StorageResolution=1 in PutMetricData; standard is 60s. Detailed monitoring is the EC2 term for 1-minute instance metrics — a naming trap.
Correct answer: B · Last reviewed 2026-11-03
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