{
  "Type": "AWS::RDS::OptionGroup",
  "Properties": {
    "EngineName": "mysql",
    "MajorEngineVersion": "5.6",
    "OptionGroupDescription": "A test option group",
    "OptionConfigurations":[
      {
        "OptionName": "MEMCACHED",
        "VpcSecurityGroupMemberships": ["sg-a1238db7"],
        "Port": "1234",
        "OptionSettings": [
          {"Name": "CHUNK_SIZE", "Value": "32"},
          {"Name": "BINDING_PROTOCOL", "Value": "ascii"}
        ]
      }
    ]
  }
}