Tag Archives: AQ

Monitoring AQ

Although there were already several posts on querying AQ, like “in the queue” and “enqueue“, the next one is great when monitoring AQ. We are using this to monitor AQ, especially for Oracle ESB (hence the commented addition):

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SELECT aq.name
,      aq.queue_table
,      aq.queue_type
,      v$aq.* 
FROM   v$aq
,      all_queues aq
WHERE  aq.qid = v$aq.qid
-- use if looking for ESB AQ: and    aq.queue_table = 'ESB_JAVA_DEFERRED';
;

The query will result in something like:

Monitoring AQ query results

It contains the following metrics:

  • Waiting – Number of waiting message;
  • Ready – Number of messages with status ready;
  • Expired – Number of expired messages;
  • Total Wait – Total waiting time per queue;
  • Average Wait – Average waiting time per queue.

A describtion of the AQ and Streams views can be found here.