- [HTTP request](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#body.HTTP_TEMPLATE)
- [Path parameters](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#body.PATH_PARAMETERS)
- [Request body](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#body.request_body)
- [Response body](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#body.response_body)
- [Authorization scopes](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#body.aspect)
- [PerformDiskShrinkContext](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#PerformDiskShrinkContext)
  - [JSON representation](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#PerformDiskShrinkContext.SCHEMA_REPRESENTATION)
- [Examples](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#examples)
- [Try it!](https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#try-it)

Perform Disk Shrink on primary instance.

### HTTP request

`POST https://sqladmin.googleapis.com/sql/v1beta4/projects/{project}/instances/{instance}/performDiskShrink`

The URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.

### Path parameters

| Parameters ||
|---|---|
| `project` | `string` Project ID of the project that contains the instance. |
| `instance` | `string` Cloud SQL instance ID. This does not include the project ID. |

### Request body

The request body contains an instance of `https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/projects.instances/performDiskShrink#PerformDiskShrinkContext`.

### Response body

If successful, the response body contains an instance of `https://docs.cloud.google.com/sql/docs/sqlserver/admin-api/rest/v1beta4/operations#Operation`.

### Authorization scopes

Requires one of the following OAuth scopes:

- `https://www.googleapis.com/auth/cloudsql`
- `
  https://www.googleapis.com/auth/cloud-platform`
- `
  https://www.googleapis.com/auth/sqlservice.admin`

For more information, see the [Authentication Overview](https://docs.cloud.google.com/docs/authentication#authorization-gcp).

## PerformDiskShrinkContext

Perform disk shrink context.

| JSON representation |
|---|
| ``` { "targetSizeGb": string } ``` |

| Fields ||
|---|---|
| `targetSizeGb` | `string (https://developers.google.com/discovery/v1/type-format format)` The target disk shrink size in GigaBytes. |