# UpdateEndpointWeightsAndCapacities
<a name="API_UpdateEndpointWeightsAndCapacities"></a>

Updates variant weight of one or more variants associated with an existing endpoint, or capacity of one variant associated with an existing endpoint. When it receives the request, SageMaker sets the endpoint status to `Updating`. After updating the endpoint, it sets the status to `InService`. To check the status of an endpoint, use the [DescribeEndpoint](https://docs.amazonaws.cn/sagemaker/latest/APIReference/API_DescribeEndpoint.html) API. 

## Request Syntax
<a name="API_UpdateEndpointWeightsAndCapacities_RequestSyntax"></a>

```
{
   "DesiredWeightsAndCapacities": [ 
      { 
         "DesiredInstanceCount": {{number}},
         "DesiredWeight": {{number}},
         "ServerlessUpdateConfig": { 
            "MaxConcurrency": {{number}},
            "ProvisionedConcurrency": {{number}}
         },
         "VariantName": "{{string}}"
      }
   ],
   "EndpointName": "{{string}}"
}
```

## Request Parameters
<a name="API_UpdateEndpointWeightsAndCapacities_RequestParameters"></a>

For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

The request accepts the following data in JSON format.

 ** [DesiredWeightsAndCapacities](#API_UpdateEndpointWeightsAndCapacities_RequestSyntax) **   <a name="sagemaker-UpdateEndpointWeightsAndCapacities-request-DesiredWeightsAndCapacities"></a>
An object that provides new capacity and weight values for a variant.  
Type: Array of [DesiredWeightAndCapacity](API_DesiredWeightAndCapacity.md) objects  
Array Members: Minimum number of 1 item.  
Required: Yes

 ** [EndpointName](#API_UpdateEndpointWeightsAndCapacities_RequestSyntax) **   <a name="sagemaker-UpdateEndpointWeightsAndCapacities-request-EndpointName"></a>
The name of an existing SageMaker endpoint.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 63.  
Pattern: `[a-zA-Z0-9](-*[a-zA-Z0-9]){0,62}`   
Required: Yes

## Response Syntax
<a name="API_UpdateEndpointWeightsAndCapacities_ResponseSyntax"></a>

```
{
   "EndpointArn": "string"
}
```

## Response Elements
<a name="API_UpdateEndpointWeightsAndCapacities_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [EndpointArn](#API_UpdateEndpointWeightsAndCapacities_ResponseSyntax) **   <a name="sagemaker-UpdateEndpointWeightsAndCapacities-response-EndpointArn"></a>
The Amazon Resource Name (ARN) of the updated endpoint.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Pattern: `arn:aws[a-z\-]*:sagemaker:[a-z0-9\-]*:[0-9]{12}:endpoint/.*` 

## Errors
<a name="API_UpdateEndpointWeightsAndCapacities_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** ResourceLimitExceeded **   
 You have exceeded an SageMaker resource limit. For example, you might have too many training jobs created.   
HTTP Status Code: 400

## See Also
<a name="API_UpdateEndpointWeightsAndCapacities_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/sagemaker-2017-07-24/UpdateEndpointWeightsAndCapacities)