AWS::AutoScalingPlans::ScalingPlan CustomizedLoadMetricSpecification
CustomizedLoadMetricSpecification
is a subproperty of ScalingInstruction that specifies a customized load metric for predictive
scaling to use with a scaling plan.
For predictive scaling to work with a customized load metric specification, Amazon Auto Scaling needs access to the Sum
and Average
statistics
that CloudWatch computes from metric data.
When you choose a load metric, make sure that the required Sum
and
Average
statistics for your metric are available in CloudWatch and that
they provide relevant data for predictive scaling. The Sum
statistic must
represent the total load on the resource, and the Average
statistic must
represent the average load per capacity unit of the resource. For example, there is a
metric that counts the number of requests processed by your Auto Scaling group. If the
Sum
statistic represents the total request count processed by the group,
then the Average
statistic for the specified metric must represent the average
request count processed by each instance of the group.
If you publish your own metrics, you can aggregate the data points at a given interval and then publish the aggregated data points to CloudWatch. Before Amazon Auto Scaling generates the forecast, it sums up all the metric data points that occurred within each hour to match the granularity period that is used in the forecast (60 minutes).
For information about terminology, available metrics, or how to publish new metrics, see Amazon CloudWatch Concepts in the Amazon CloudWatch User Guide.
After creating your scaling plan, you can use the Amazon Auto Scaling console to visualize forecasts for the specified metric. For more information, see View scaling information for a resource in the Scaling Plans User Guide.
Syntax
To declare this entity in your Amazon CloudFormation template, use the following syntax:
JSON
{ "Dimensions" :
[ MetricDimension, ... ]
, "MetricName" :String
, "Namespace" :String
, "Statistic" :String
, "Unit" :String
}
YAML
Dimensions:
 MetricDimension
MetricName:String
Namespace:String
Statistic:String
Unit:String
Properties
Dimensions

The dimensions of the metric.
Conditional: If you published your metric with dimensions, you must specify the same dimensions in your customized load metric specification.
Required: No
Type: Array of MetricDimension
Update requires: No interruption
MetricName

The name of the metric.
Required: Yes
Type: String
Update requires: No interruption
Namespace

The namespace of the metric.
Required: Yes
Type: String
Update requires: No interruption
Statistic

The statistic of the metric.
Allowed Values:
Sum
Required: Yes
Type: String
Update requires: No interruption
Unit

The unit of the metric.
Required: No
Type: String
Update requires: No interruption