How can I change WebLogic MDB polling frequency?

Question

I have MDB deployed to WebLogic and listening on AQ. Because of SLA, I would like the MDB to poll every 5 seconds or less no matter what. From WebLogic log I could see that the polling frequency varies depending on the load on the queue. The following shows what happens when the MDB is deployed and finds no message in the queue.
5-Feb-2014 4:11:09                    - checks when first deployed
5-Feb-2014 4:11:10        +1        - checks again after on seecond
5-Feb-2014 4:11:12        +2        - checks after two seconds
5-Feb-2014 4:11:16        +4
5-Feb-2014 4:11:24        +8
5-Feb-2014 4:11:39        +15
5-Feb-2014 4:11:54        +15
Every 15 seconds from this on. Once it fetches a message it goes back to every second, two second, four second ...
What can I do to get the desired behavior? I understand what WebLogic is doing but it does not meet the SLA requirement. This is the code for my MDB. Thanks.
public class SlowMDB implements MessageListener {
    @Resource
    private MessageDrivenContext messageContext;
    @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
    public void onMessage(Message message) {
      try {
        System.out.println("SlowMDB:  Message was received " + message.toString());
      } catch (JMSException e) {
          e.printStackTrace();

Answer 1

weblogic-ejb-jar.xml. Note that I added <use81-style-polling>true</use81-style-polling> as per Rosario's suggestion, but I get the same behavior with or without it.
  <weblogic-enterprise-bean>
    <ejb-name>SlowMDB</ejb-name>
    <message-driven-descriptor>
      <pool>
        <max-beans-in-free-pool>1</max-beans-in-free-pool>
        <initial-beans-in-free-pool>1</initial-beans-in-free-pool>
      </pool>
      <use81-style-polling>true</use81-style-polling>
    </message-driven-descriptor>
  </weblogic-enterprise-bean>
</weblogic-ejb-jar>
Also, if I remove TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) from the onMessage method, then I could see that WebLogic (or AQ??) polls every two seconds and it uses a different deque stored procesdure:
Transactional:
     dequeue(ZYGT.MS_MSGREQ_INQ, oracle.jdbc.aq.AQDequeueOptions@1a019d2f, SYS.AQ$_JMS_TEXT_MESSAGE)>
Non transactional:
dbms_aqin.aq$_dequeue_in(queue_name       => ?, subscriber        => ?, msgid             => ?, correlation       => ?, dequeue_mode      => ?, navigation        => ?,
visibility        => ?, wait              => ?, enqueue_time      => ?, state             => ?, out_msgid         => ?, out_correlation   => ?, priority          => ?,
delay             => ?, expiration        => ?, attempts          => ?, exception_queue   => ?, remote_recipients => ?, sender_name       => ?, sender_addr       => ?,
sender_protocol   => ?, original_msgid    => ?, payload_type      => ?, raw_user_data     => ?, object_user_data  => ?, deq_cond          => ?, signature         => ?,
out_sign          => ?, transformation    => ?, delivery_mode     => ?, out_delivery_mode => ?); end; )
with the following parameters
setString(1, MYSCHEMA.MY_QUEUE)
setString(2, null)
setNull(3, -2)
setString(4, null)
setString(26, null)
setObject(5, 3, 4)
setObject(6, 1, 4)
setObject(7, 2, 4)
setLong(8, 120)
registerOutParameter(9, 93)
registerOutParameter(10, 4)
registerOutParameter(11, -2)
registerOutParameter(12, 12)
registerOutParameter(13, 4)
registerOutParameter(14, 4)
registerOutParameter(15, 4)
registerOutParameter(16, 4)
registerOutParameter(17, 12)
registerOutParameter(18, 2003, SYS.AQ$_RECIPIENTS)
registerOutParameter(19, 12)
registerOutParameter(20, 12)
registerOutParameter(21, 4)
registerOutParameter(22, -2)
setObject(23, 1, 4)
registerOutParameter(24, -2)
registerOutParameter(25, 2002, SYS.AQ$_JMS_TEXT_MESSAGE)
setNull(27, 2002, SYS.AQ$_SIG_PROP)
registerOutParameter(28, 2002, SYS.AQ$_SIG_PROP)
setString(29, null)
setObject(30, 1, 4)
registerOutParameter(31, 4)
setLong(8, 0)