[Yandex Cloud documentation](../../index.md) > [Terraform in Yandex Cloud](../index.md) > Terraform reference > Resources > Serverless Cloud Functions > Data Sources > function_scaling_policy

# yandex_function_scaling_policy (DataSource)

Get information about a Yandex Cloud Function Scaling Policy. For more information about Yandex Cloud Functions, see [Yandex Cloud Functions](../../functions/index.md).

This data source is used to define [Yandex Cloud Function Scaling Policy](../../functions/index.md) that can be used by other resources.

## Example usage

```terraform
//
// Get information about existing Cloud Function Scaling Policy.
//
data "yandex_function_scaling_policy" "my_scaling_policy" {
  function_id = "d4e45**********pqvd3"
}
```

## Arguments & Attributes Reference

- `function_id` (**Required**)(String). Yandex Cloud Function id used to define function.
- `id` (String). 
- `policy` [Block]. List definition for Yandex Cloud Function scaling policies.
  - `tag` (**Required**)(String). Yandex Cloud Function version tag for Yandex Cloud Function scaling policy.
  - `zone_instances_limit` (Number). Max number of instances in one zone for Yandex Cloud Function with tag.
  - `zone_requests_limit` (Number). Max number of requests in one zone for Yandex Cloud Function with tag.