4.300 DBA_HIST_BUFFERED_SUBSCRIBERS

DBA_HIST_BUFFERED_SUBSCRIBERS displays historical information about the subscribers for all buffered queues in the instance.

Column Datatype NULL Description

SNAP_ID

NUMBER

NOT NULL

Unique snapshot ID

DBID

NUMBER

NOT NULL

Database ID for the snapshot

INSTANCE_NUMBER

NUMBER

NOT NULL

Instance number for the snapshot

QUEUE_SCHEMA

VARCHAR2(128)

NOT NULL

Owner of the queue

QUEUE_NAME

VARCHAR2(128)

NOT NULL

Name of the queue

SUBSCRIBER_ID

NUMBER

NOT NULL

Internal subscriber number (for identification)

SUBSCRIBER_NAME

VARCHAR2(128)

Name of the subscriber

SUBSCRIBER_ADDRESS

VARCHAR2(1024)

Address of the subscribing agent

SUBSCRIBER_TYPE

VARCHAR2(128)

Type of subscriber:

  • PROXY - Proxy subscriber

  • SUBSCRIBOR

STARTUP_TIME

DATE

NOT NULL

Startup time of the instance

LAST_BROWSED_SEQ

NUMBER

Sequence number of the most recently browsed message for the subscriber (comparable to the number of messages in the V$STREAMS_APPLY_READER view)

LAST_BROWSED_NUM

NUMBER

Internal Message number for the most recently browsed message for the subscriber

LAST_DEQUEUED_SEQ

NUMBER

Sequence number of the most recently dequeued message for the subscriber (comparable to the number of messages in the V$STREAMS_APPLY_COORDINATOR view)

LAST_DEQUEUED_NUM

NUMBER

Internal Message number for the most recently dequeued message for the subscriber

CURRENT_ENQ_SEQ

NUMBER

Current sequence number of the most recently enqueued message for the subscriber

NUM_MSGS

NUMBER

Total number of outstanding messages currently enqueued in the buffered queue for the subscriber (includes the count of the messages overflowed to disk)

CNUM_MSGS

NUMBER

Cumulative total number of messages enqueued for the subscriber since the creation of the buffered queue

TOTAL_DEQUEUED_MSG

NUMBER

Total number of messages dequeued by the subscriber

TOTAL_SPILLED_MSG

NUMBER

Total number of spilled messages for the subscriber

EXPIRED_MSGS

NUMBER

Number of expired messages

MESSAGE_LAG

NUMBER

Message lag of the subscriber

ELAPSED_DEQUEUE_TIME

NUMBER

Total time spent in dequeue (in hundredths of a second)

DEQUEUE_CPU_TIME

NUMBER

Total CPU time for dequeue (in hundredths of a second)

LAST_DEQUEUE_TIME

TIMESTAMP(3)

Last message dequeue time

OLDEST_MSGID

RAW(16)

Message ID of the oldest message

OLDEST_MSG_ENQTM

TIMESTAMP(3)

Enqueue time of the oldest message

CON_DBID

NUMBER

The database ID of the PDB for the sampled session

CON_ID

NUMBER

The ID of the container that CON_DBID identifies. 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