# ReferenceProperty

Specifies an instance family to use as the baseline reference for CPU performance.

- Source: Generated code
- Type last changed: v2.172.0 · 7 Dec 2024

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_ec2 as ec2 } from 'aws-cdk-lib';
const referenceProperty: ec2.CfnLaunchTemplate.ReferenceProperty = {
  instanceFamily: 'instanceFamily',
};
```

## Properties

- `instanceFamily`: string — The instance family to use as a baseline reference.

  > Ensure that you specify the correct value for the instance family. The instance family is everything before the period ( `.` ) in the instance type name. For example, in the instance type `c6i.large` , the instance family is `c6i` , not `c6` . For more information, see [Amazon EC2 instance type naming conventions](https://docs.aws.amazon.com/ec2/latest/instancetypes/instance-type-names.html) in *Amazon EC2 Instance Types* .

  The following instance families are *not supported* for performance protection:

  - `c1`
  - `g3` | `g3s`
  - `hpc7g`
  - `m1` | `m2`
  - `mac1` | `mac2` | `mac2-m1ultra` | `mac2-m2` | `mac2-m2pro`
  - `p3dn` | `p4d` | `p5`
  - `t1`
  - `u-12tb1` | `u-18tb1` | `u-24tb1` | `u-3tb1` | `u-6tb1` | `u-9tb1` | `u7i-12tb` | `u7in-16tb` | `u7in-24tb` | `u7in-32tb`

  If you enable performance protection by specifying a supported instance family, the returned instance types will exclude the above unsupported instance families.