# DescribeEngineDefaultParameters
<a name="API_DescribeEngineDefaultParameters"></a>

Returns the default engine and system parameter information for the specified cache engine.

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

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

 ** CacheParameterGroupFamily **   
The name of the cache parameter group family.  
Valid values are: `memcached1.4` \$1 `memcached1.5` \$1 `memcached1.6` \$1 `redis2.6` \$1 `redis2.8` \$1 `redis3.2` \$1 `redis4.0` \$1 `redis5.0` \$1 `redis6.x` \$1 `redis6.2` \$1 `redis7`   
Type: String  
Required: Yes

 ** Marker **   
An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by `MaxRecords`.  
Type: String  
Required: No

 ** MaxRecords **   
The maximum number of records to include in the response. If more records exist than the specified `MaxRecords` value, a marker is included in the response so that the remaining results can be retrieved.  
Default: 100  
Constraints: minimum 20; maximum 100.  
Type: Integer  
Required: No

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

The following element is returned by the service.

 ** EngineDefaults **   
Represents the output of a `DescribeEngineDefaultParameters` operation.  
Type: [EngineDefaults](API_EngineDefaults.md) object

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

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

 ** InvalidParameterCombination **   
Two or more incompatible parameters were specified.    
 ** message **   
Two or more parameters that must not be used together were used together.
HTTP Status Code: 400

 ** InvalidParameterValue **   
The value for a parameter is invalid.    
 ** message **   
A parameter value is invalid.
HTTP Status Code: 400

## Examples
<a name="API_DescribeEngineDefaultParameters_Examples"></a>

### DescribeEngineDefaultParameters
<a name="API_DescribeEngineDefaultParameters_Example_1"></a>

Some of the output has been omitted for brevity.

#### Sample Request
<a name="API_DescribeEngineDefaultParameters_Example_1_Request"></a>

```
https://elasticache.us-west-2.amazonaws.com/
   ?Action=DescribeEngineDefaultParameters
   &CacheParameterGroupFamily=memcached1.4
   &MaxRecords=100
   &Version=2015-02-02
   &SignatureVersion=4
   &SignatureMethod=HmacSHA256
   &Timestamp=20150202T192317Z
   &X-Amz-Credential=<credential>
```

#### Sample Response
<a name="API_DescribeEngineDefaultParameters_Example_1_Response"></a>

```
<DescribeEngineDefaultParametersResponse xmlns="http://elasticache.amazonaws.com/doc/2015-02-02/">
  <DescribeEngineDefaultParametersResult>
    <EngineDefaults>
      <CacheParameterGroupFamily>memcached1.4</CacheParameterGroupFamily>
      <Parameters>
        <Parameter>
          <ParameterValue>1024</ParameterValue>
          <DataType>integer</DataType>
          <Source>system</Source>
          <IsModifiable>false</IsModifiable>
          <Description>The backlog queue limit.</Description>
          <AllowedValues>1-10000</AllowedValues>
          <ParameterName>backlog_queue_limit</ParameterName>
          <MinimumEngineVersion>1.4.5</MinimumEngineVersion>
        </Parameter>
        <Parameter>
                
 (...output omitted...)
          
        </Parameter>
      </Parameters>
      <CacheNodeTypeSpecificParameters>
        <CacheNodeTypeSpecificParameter>
          <CacheNodeTypeSpecificValues>
            <CacheNodeTypeSpecificValue>
              <CacheNodeType>cache.c1.xlarge</CacheNodeType>
              <Value>6000</Value>
            </CacheNodeTypeSpecificValue>
               
 (...output omitted...)
          
          </CacheNodeTypeSpecificValues>
          <DataType>integer</DataType>
          <Source>system</Source>
          <IsModifiable>false</IsModifiable>
          <Description>The maximum configurable amount of memory to use to store items, in megabytes.</Description>
          <AllowedValues>1-100000</AllowedValues>
          <ParameterName>max_cache_memory</ParameterName>
          <MinimumEngineVersion>1.4.5</MinimumEngineVersion>
        </CacheNodeTypeSpecificParameter>
               
 (...output omitted...)
          
      </CacheNodeTypeSpecificParameters>
    </EngineDefaults>
  </DescribeEngineDefaultParametersResult>
  <ResponseMetadata>
    <RequestId>061282fe-b7fd-11e0-9326-b7275b9d4a6c</RequestId>
  </ResponseMetadata>
</DescribeEngineDefaultParametersResponse>
```

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

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/elasticache-2015-02-02/DescribeEngineDefaultParameters) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticache-2015-02-02/DescribeEngineDefaultParameters)