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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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V$AQ_SUBSCRIBER_LOAD

V$AQ_SUBSCRIBER_LOAD describes the load of all subscribers of sharded queues in terms of latency at every instance in an Oracle RAC environment. Latency denotes the predicted amount of time (in seconds) required from the current time to drain all the messages for that subscriber at each respective instance. The latency calculation considers past enqueue/dequeue rates and future enqueue/dequeue rates based on history.

Column Datatype Description
QUEUE_ID NUMBER Queue ID
QUEUE_SCHEMA VARCHAR2(30) Queue schema
QUEUE_NAME VARCHAR2(30) Queue name
SUBSCRIBER_ID NUMBER Subscriber ID
SUBSCRIBER_NAME VARCHAR2(30) Subscriber name
LATENCY_STATE VARCHAR2(8) Possible values:
  • FINITE - The subscriber will be able to dequeue all the messages in a finite amount of time

  • INFINITE - The subscriber's dequeue rate may not catch up to the enqueue rate

  • UNKNOWN - Latency is not yet known

LATENCY NUMBER Latency (in seconds). Valid only when LATENCY_STATE is FINITE.
DEQUEUE_REQUESTS NUMBER Approximate number of dequeue requests noted recently
ACTIVE_SHARDS NUMBER Number of queue shards that have messages for this subscriber
ACTIVE_LISTENER VARCHAR2(5) Indicates whether the subscriber is actively listening at this instance for messages (TRUE) or not (FALSE)
FLAGS NUMBER For internal use only
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 Database Advanced Queuing User's Guide for more information about Oracle Database Advanced Queueing