# PredefinedMetric

One of the predefined autoscaling metrics.

- Source: [`aws-applicationautoscaling/lib/target-tracking-scaling-policy.ts`](https://github.com/aws/aws-cdk/blob/v2.276.0/packages/aws-cdk-lib/aws-applicationautoscaling/lib/target-tracking-scaling-policy.ts#L204)
- Type last changed: v2.154.0 · 22 Aug 2024

## Example

```ts
const shardsScalableTarget = new appscaling.ScalableTarget(this, 'ElastiCacheRedisShardsScalableTarget', {
  serviceNamespace: appscaling.ServiceNamespace.ELASTICACHE,
  scalableDimension: 'elasticache:replication-group:NodeGroups',
  minCapacity: 2,
  maxCapacity: 10,
  resourceId: 'replication-group/main-cluster',
});

shardsScalableTarget.scaleToTrackMetric('ElastiCacheRedisShardsCPUUtilization', {
  targetValue: 20,
  predefinedMetric: appscaling.PredefinedMetric.ELASTICACHE_PRIMARY_ENGINE_CPU_UTILIZATION,
});
```

## Members

| Member | Description |
| --- | --- |
| `APPSTREAM_AVERAGE_CAPACITY_UTILIZATION` | Average percentage of instances in an AppStream fleet that are being used. |
| `CASSANDRA_READ_CAPACITY_UTILIZATION` | Percentage of provisioned read capacity units utilized by a Keyspaces table. |
| `CASSANDRA_WRITE_CAPACITY_UTILIZATION` | Percentage of provisioned write capacity units utilized by a Keyspaces table. |
| `COMPREHEND_INFERENCE_UTILIZATION` | Percentage of provisioned inference units utilized by a Comprehend endpoint. |
| `NEPTURE_READER_AVERAGE_CPU_UTILIZATION` | Average CPU Utilization of read replica instances in a Neptune DB cluster. |
| `DYNAMODB_READ_CAPACITY_UTILIZATION` | Percentage of provisioned read capacity units consumed by a DynamoDB table. |
| `DYNAMODB_WRITE_CAPACITY_UTILIZATION` | Percentage of provisioned write capacity units consumed by a DynamoDB table. |
| `DYANMODB_WRITE_CAPACITY_UTILIZATION` | DYANMODB_WRITE_CAPACITY_UTILIZATION. |
| `ALB_REQUEST_COUNT_PER_TARGET` | ALB_REQUEST_COUNT_PER_TARGET. |
| `RDS_READER_AVERAGE_CPU_UTILIZATION` | RDS_READER_AVERAGE_CPU_UTILIZATION. |
| `RDS_READER_AVERAGE_DATABASE_CONNECTIONS` | RDS_READER_AVERAGE_DATABASE_CONNECTIONS. |
| `EC2_SPOT_FLEET_REQUEST_AVERAGE_CPU_UTILIZATION` | EC2_SPOT_FLEET_REQUEST_AVERAGE_CPU_UTILIZATION. |
| `EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_IN` | EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_IN. |
| `EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_OUT` | EC2_SPOT_FLEET_REQUEST_AVERAGE_NETWORK_OUT. |
| `SAGEMAKER_VARIANT_INVOCATIONS_PER_INSTANCE` | SAGEMAKER_VARIANT_INVOCATIONS_PER_INSTANCE. |
| `SAGEMAKER_VARIANT_PROVISIONED_CONCURRENCY_UTILIZATION` | SAGEMAKER_VARIANT_PROVISIONED_CONCURRENCY_UTILIZATION. |
| `SAGEMAKER_INFERENCE_COMPONENT_INVOCATIONS_PER_COPY` | SAGEMAKER_INFERENCE_COMPONENT_INVOCATIONS_PER_COPY. |
| `ECS_SERVICE_AVERAGE_CPU_UTILIZATION` | ECS_SERVICE_AVERAGE_CPU_UTILIZATION. |
| `ECS_SERVICE_AVERAGE_MEMORY_UTILIZATION` | ECS_SERVICE_AVERAGE_MEMORY_UTILIZATION. |
| `LAMBDA_PROVISIONED_CONCURRENCY_UTILIZATION` | LAMBDA_PROVISIONED_CONCURRENCY_UTILIZATION. |
| `KAFKA_BROKER_STORAGE_UTILIZATION` | KAFKA_BROKER_STORAGE_UTILIZATION. |
| `ELASTICACHE_PRIMARY_ENGINE_CPU_UTILIZATION` | ELASTICACHE_PRIMARY_ENGINE_CPU_UTILIZATION. |
| `ELASTICACHE_REPLICA_ENGINE_CPU_UTILIZATION` | ELASTICACHE_REPLICA_ENGINE_CPU_UTILIZATION. |
| `ELASTICACHE_DATABASE_MEMORY_USAGE_COUNTED_FOR_EVICT_PERCENTAGE` | ELASTICACHE_DATABASE_MEMORY_USAGE_COUNTED_FOR_EVICT_PERCENTAGE. |
| `ELASTICACHE_DATABASE_CAPACITY_USAGE_COUNTED_FOR_EVICT_PERCENTAGE` | ELASTICACHE_DATABASE_CAPACITY_USAGE_COUNTED_FOR_EVICT_PERCENTAGE. |
| `SAGEMAKER_INFERENCE_COMPONENT_CONCURRENT_REQUESTS_PER_COPY_HIGH_RESOLUTION` | SAGEMAKER_INFERENCE_COMPONENT_CONCURRENT_REQUESTS_PER_COPY_HIGH_RESOLUTION. |
| `SAGEMAKER_VARIANT_CONCURRENT_REQUESTS_PER_MODEL_HIGH_RESOLUTION` | SAGEMAKER_VARIANT_CONCURRENT_REQUESTS_PER_MODEL_HIGH_RESOLUTION. |
| `WORKSPACES_AVERAGE_USER_SESSIONS_CAPACITY_UTILIZATION` | WORKSPACES_AVERAGE_USER_SESSIONS_CAPACITY_UTILIZATION. |

## Referenced by

- [`BasicTargetTrackingScalingPolicyProps`](/v2/docs/aws-cdk-lib.aws_applicationautoscaling.BasicTargetTrackingScalingPolicyProps).predefinedMetric