The new compute and memory capacity of the DB instance. To determine the instance classes that are available for a particular DB engine, use the DescribeOrderableDBInstanceOptions action. Passing a value for this parameter causes an outage during the change and is applied during the next maintenance window, unless the ApplyImmediately parameter is specified as true for this request. Default: Uses existing setting Valid Values: db.t1.micro | db.m1.small | db.m1.medium | db.m1.large | db.m1.xlarge | db.m2.xlarge | db.m2.2xlarge | db.m2.4xlarge

public string DBInstanceClass { get; set; }