Amazon CloudWatch
API Reference (API Version 2010-08-01)


The MetricDatum data type encapsulates the information sent with PutMetricData to either create a new metric or add new values to be aggregated into an existing metric.



A list of dimensions associated with the metric. Note, when using the Dimensions value in a query, you need to append .member.N to it (e.g., Dimensions.member.N).

Type: array of Dimension objects

Array Members: Maximum number of 10 items.

Required: No


The name of the metric.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Required: Yes


A set of statistical values describing the metric.

Type: StatisticSet object

Required: No


A point in time expressed as the number of milliseconds since Jan 1, 1970 00:00:00 UTC. If not specified, the default value is set to the time the metric data was received.

Type: Timestamp

Required: No


The unit of the metric.

Type: String

Valid Values: Seconds | Microseconds | Milliseconds | Bytes | Kilobytes | Megabytes | Gigabytes | Terabytes | Bits | Kilobits | Megabits | Gigabits | Terabits | Percent | Count | Bytes/Second | Kilobytes/Second | Megabytes/Second | Gigabytes/Second | Terabytes/Second | Bits/Second | Kilobits/Second | Megabits/Second | Gigabits/Second | Terabits/Second | Count/Second | None

Required: No


The value for the metric.


Although the Value parameter accepts numbers of type Double, Amazon CloudWatch rejects values that are either too small or too large. Values must be in the range of 8.515920e-109 to 1.174271e+108 (Base 10) or 2e-360 to 2e360 (Base 2). In addition, special values (e.g., NaN, +Infinity, -Infinity) are not supported.

Type: Double

Required: No