V$AQ

V$AQ displays statistics for the queues in the database.

Column	Datatype	Description
QID	NUMBER	Unique queue identifier
WAITING	NUMBER	Number of messages in the queue in the state ‘WAITING’
READY	NUMBER	Number of messages in the queue in the state ‘READY’
EXPIRED	NUMBER	Number of messages in the queue the state ‘EXPIRED’
AVERAGE_MSG_AGE	NUMBER	Average age of the messages in the queue’
TOTAL_WAIT	NUMBER	Total wait time of all ‘READY’ messages in the queue
AVERAGE_WAIT	NUMBER	Average wait time of ‘READY’ messages in the queue
CON_ID	NUMBER	The ID of the container to which the data pertains. Possible values include: 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. 1: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data

See Also: Oracle AI Database Transactional Event Queues and Advanced Queuing User’s Guide for more information about Oracle Database Advanced Queueing