# CfnResourceAutoScalingCreationPolicy

For an Auto Scaling group replacement update, specifies how many instances must signal success for the update to succeed.

- Source: [`core/lib/cfn-resource-policy.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/core/lib/cfn-resource-policy.ts#L40)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as cdk from 'aws-cdk-lib';
const cfnResourceAutoScalingCreationPolicy: cdk.CfnResourceAutoScalingCreationPolicy = {
  minSuccessfulInstancesPercent: 123,
};
```

## Properties

- `minSuccessfulInstancesPercent`: number — Specifies the percentage of instances in an Auto Scaling replacement update that must signal success for the update to succeed.

  You can specify a value from 0 to 100. AWS CloudFormation rounds to the nearest tenth of a percent.
  For example, if you update five instances with a minimum successful percentage of 50, three instances must signal success.
  If an instance doesn't send a signal within the time specified by the Timeout property, AWS CloudFormation assumes that the
  instance wasn't created.