# File lib/rds/rds.rb, line 120
    def describe_db_instances(options={})
      params = {}
      params['DBInstanceIdentifier'] = options[:db_instance_identifier] if options[:db_instance_identifier]
      params['MaxRecords'] = options[:max_records] if options[:max_records]
      params['Marker'] = options[:marker] if options[:marker]

      resp = do_request("DescribeDBInstances", params, :pull_out_array=>[:describe_db_instances_result, :db_instances])

    rescue Exception
      on_exception
    end