public String getScalableDimension() {
        return this.scalableDimension;
    }
<p>
The scalable dimension. This string consists of the service namespace, resource type, and scaling property. If
you specify a scalable dimension, you must also specify a resource ID.
</p>
<ul>
<li>
<p>
<code>ecs:service:DesiredCount</code> - The task count of an ECS service.
</p>
</li>
<li>
<p>
<code>elasticmapreduce:instancegroup:InstanceCount</code> - The instance count of an EMR Instance Group.
</p>
</li>
<li>
<p>
<code>ec2:spot-fleet-request:TargetCapacity</code> - The target capacity of a Spot Fleet.
</p>
</li>
<li>
<p>
<code>appstream:fleet:DesiredCapacity</code> - The capacity of an AppStream 2.0 fleet.
</p>
</li>
<li>
<p>
<code>dynamodb:table:ReadCapacityUnits</code> - The provisioned read capacity for a DynamoDB table.
</p>
</li>
<li>
<p>
<code>dynamodb:table:WriteCapacityUnits</code> - The provisioned write capacity for a DynamoDB table.
</p>
</li>
<li>
<p>
<code>dynamodb:index:ReadCapacityUnits</code> - The provisioned read capacity for a DynamoDB global secondary
index.
</p>
</li>
<li>
<p>
<code>dynamodb:index:WriteCapacityUnits</code> - The provisioned write capacity for a DynamoDB global secondary
index.
</p>
</li>
<li>
<p>
<code>rds:cluster:ReadReplicaCount</code> - The count of Aurora Replicas in an Aurora DB cluster. Available for
Aurora MySQL-compatible edition and Aurora PostgreSQL-compatible edition.
</p>
</li>
<li>
<p>
<code>sagemaker:variant:DesiredInstanceCount</code> - The number of EC2 instances for a SageMaker model endpoint
variant.
</p>
</li>
<li>
<p>
<code>custom-resource:ResourceType:Property</code> - The scalable dimension for a custom resource provided by
your own application or service.
</p>
</li>
<li>
<p>
<code>comprehend:document-classifier-endpoint:DesiredInferenceUnits</code> - The number of inference units for an
Amazon Comprehend document classification endpoint.
</p>
</li>
<li>
<p>
<code>comprehend:entity-recognizer-endpoint:DesiredInferenceUnits</code> - The number of inference units for an
Amazon Comprehend entity recognizer endpoint.
</p>
</li>
<li>
<p>
<code>lambda:function:ProvisionedConcurrency</code> - The provisioned concurrency for a Lambda function.
</p>
</li>
<li>
<p>
<code>cassandra:table:ReadCapacityUnits</code> - The provisioned read capacity for an Amazon Keyspaces table.
</p>
</li>
<li>
<p>
<code>cassandra:table:WriteCapacityUnits</code> - The provisioned write capacity for an Amazon Keyspaces table.
</p>
</li>
<li>
<p>
<code>kafka:broker-storage:VolumeSize</code> - The provisioned volume size (in GiB) for brokers in an Amazon MSK
cluster.
</p>
</li>
<li>
<p>
<code>elasticache:replication-group:NodeGroups</code> - The number of node groups for an Amazon ElastiCache
replication group.
</p>
</li>
<li>
<p>
<code>elasticache:replication-group:Replicas</code> - The number of replicas per node group for an Amazon
ElastiCache replication group.
</p>
</li>
<li>
<p>
<code>neptune:cluster:ReadReplicaCount</code> - The count of read replicas in an Amazon Neptune DB cluster.
</p>
</li>
<li>
<p>
<code>sagemaker:variant:DesiredProvisionedConcurrency</code> - The provisioned concurrency for a SageMaker
serverless endpoint.
</p>
</li>
<li>
<p>
<code>sagemaker:inference-component:DesiredCopyCount</code> - The number of copies across an endpoint for a
SageMaker inference component.
</p>
</li>
<li>
<p>
<code>workspaces:workspacespool:DesiredUserSessions</code> - The number of user sessions for the WorkSpaces in
the pool.
</p>
</li>
</ul>

@return The scalable dimension. This string consists of the service namespace, resource type, and scaling
        property. If you specify a scalable dimension, you must also specify a resource ID.</p>
        <ul>
        <li>
        <p>
        <code>ecs:service:DesiredCount</code> - The task count of an ECS service.
        </p>
        </li>
        <li>
        <p>
        <code>elasticmapreduce:instancegroup:InstanceCount</code> - The instance count of an EMR Instance Group.
        </p>
        </li>
        <li>
        <p>
        <code>ec2:spot-fleet-request:TargetCapacity</code> - The target capacity of a Spot Fleet.
        </p>
        </li>
        <li>
        <p>
        <code>appstream:fleet:DesiredCapacity</code> - The capacity of an AppStream 2.0 fleet.
        </p>
        </li>
        <li>
        <p>
        <code>dynamodb:table:ReadCapacityUnits</code> - The provisioned read capacity for a DynamoDB table.
        </p>
        </li>
        <li>
        <p>
        <code>dynamodb:table:WriteCapacityUnits</code> - The provisioned write capacity for a DynamoDB table.
        </p>
        </li>
        <li>
        <p>
        <code>dynamodb:index:ReadCapacityUnits</code> - The provisioned read capacity for a DynamoDB global
        secondary index.
        </p>
        </li>
        <li>
        <p>
        <code>dynamodb:index:WriteCapacityUnits</code> - The provisioned write capacity for a DynamoDB global
        secondary index.
        </p>
        </li>
        <li>
        <p>
        <code>rds:cluster:ReadReplicaCount</code> - The count of Aurora Replicas in an Aurora DB cluster.
        Available for Aurora MySQL-compatible edition and Aurora PostgreSQL-compatible edition.
        </p>
        </li>
        <li>
        <p>
        <code>sagemaker:variant:DesiredInstanceCount</code> - The number of EC2 instances for a SageMaker model
        endpoint variant.
        </p>
        </li>
        <li>
        <p>
        <code>custom-resource:ResourceType:Property</code> - The scalable dimension for a custom resource
        provided by your own application or service.
        </p>
        </li>
        <li>
        <p>
        <code>comprehend:document-classifier-endpoint:DesiredInferenceUnits</code> - The number of inference
        units for an Amazon Comprehend document classification endpoint.
        </p>
        </li>
        <li>
        <p>
        <code>comprehend:entity-recognizer-endpoint:DesiredInferenceUnits</code> - The number of inference units
        for an Amazon Comprehend entity recognizer endpoint.
        </p>
        </li>
        <li>
        <p>
        <code>lambda:function:ProvisionedConcurrency</code> - The provisioned concurrency for a Lambda function.
        </p>
        </li>
        <li>
        <p>
        <code>cassandra:table:ReadCapacityUnits</code> - The provisioned read capacity for an Amazon Keyspaces
        table.
        </p>
        </li>
        <li>
        <p>
        <code>cassandra:table:WriteCapacityUnits</code> - The provisioned write capacity for an Amazon Keyspaces
        table.
        </p>
        </li>
        <li>
        <p>
        <code>kafka:broker-storage:VolumeSize</code> - The provisioned volume size (in GiB) for brokers in an
        Amazon MSK cluster.
        </p>
        </li>
        <li>
        <p>
        <code>elasticache:replication-group:NodeGroups</code> - The number of node groups for an Amazon
        ElastiCache replication group.
        </p>
        </li>
        <li>
        <p>
        <code>elasticache:replication-group:Replicas</code> - The number of replicas per node group for an Amazon
        ElastiCache replication group.
        </p>
        </li>
        <li>
        <p>
        <code>neptune:cluster:ReadReplicaCount</code> - The count of read replicas in an Amazon Neptune DB
        cluster.
        </p>
        </li>
        <li>
        <p>
        <code>sagemaker:variant:DesiredProvisionedConcurrency</code> - The provisioned concurrency for a
        SageMaker serverless endpoint.
        </p>
        </li>
        <li>
        <p>
        <code>sagemaker:inference-component:DesiredCopyCount</code> - The number of copies across an endpoint for
        a SageMaker inference component.
        </p>
        </li>
        <li>
        <p>
        <code>workspaces:workspacespool:DesiredUserSessions</code> - The number of user sessions for the
        WorkSpaces in the pool.
        </p>
        </li>
@see ScalableDimension
aws-java-sdk-applicationautoscaling/src/main/java/com/amazonaws/services/applicationautoscaling/model/DescribeScheduledActionsRequest.java