The size of a PutMetricData request is limited to 8 KB for HTTP GET requests and 40 KB for HTTP POST requests.
Value
parameter accepts numbers of type Double
, Amazon CloudWatch truncates values with very large exponents. Values with base-10 exponents greater than 126 (1 x 10^126) are truncated. Likewise, values with base-10 exponents less than -130 (1 x 10^-130) are also truncated. Data that is timestamped 24 hours or more in the past may take in excess of 48 hours to become available from submission time using GetMetricStatistics
.