V$AQ_NONDUR_SUBSCRIBER_LWM

V$AQ_NONDUR_SUBSCRIBER_LWM projects the low watermarks (LWMs) of non-durable subscribers in a sharded queue. The LWM of a non-durable subscriber is a combination of shard, priority and LWM (subshard).

Note: AQ sharded queues are deprecated in Oracle Database 21c. Oracle recommends that you instead use Transactional Event Queues (TxEventQs) for higher throughput and better performance.

Column	Datatype	Description
QUEUE_ID	NUMBER	Queue ID
SUBSCRIBER_ID	NUMBER	ID of the non-durable subscriber
SHARD_ID	NUMBER	Shard ID
PRIORITY	NUMBER	Priority of the shard
LWM	NUMBER	Lower watermark (in a subshard) of the non-durable subscriber
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