ScalingTrigger - Amazon EMR
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 9, 2026.

ScalingTrigger

The conditions that trigger an automatic scaling activity.

Contents

CloudWatchAlarmDefinition

The definition of a CloudWatch metric alarm. When the defined alarm conditions are met along with other trigger parameters, scaling activity begins.

Type: CloudWatchAlarmDefinition object

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: