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Oracle® Database Reference
11g Release 1 (11.1)

B28320-03
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V$STREAMS_APPLY_SERVER

V$STREAMS_APPLY_SERVER displays information about each apply server and its activities. An apply server receives events from the apply coordinator for an apply process. For each event received, an apply server either applies the event or sends the event to the appropriate apply handler.

Column Datatype Description
SID NUMBER Session ID of the apply server's session
SERIAL# NUMBER Serial number of the apply server's session
APPLY# NUMBER Apply process number. An apply process is an Oracle background process, prefixed by ap.
APPLY_NAME VARCHAR2(30) Name of the apply process
SERVER_ID NUMBER Parallel execution server number of the apply server
STATE VARCHAR2(20) State of the apply server:
  • IDLE - Performing no work

  • RECORD LOW-WATERMARK - Performing an administrative job that maintains information about the apply progress, which is used in the ALL_APPLY_PROGRESS and DBA_APPLY_PROGRESS data dictionary views

  • ADD PARTITION - Performing an administrative job that adds a partition that is used for recording information about in-progress transactions

  • DROP PARTITION - Performing an administrative job that drops a partition that was used to record information about in-progress transactions

  • EXECUTE TRANSACTION - Applying a transaction

  • WAIT COMMIT - Waiting to commit a transaction until all other transactions with a lower commit SCN are applied. This state is possible only if the COMMIT_SERIALIZATION apply process parameter is set to a value other than none and the PARALLELISM apply process parameter is set to a value greater than 1.

  • WAIT DEPENDENCY - Waiting to apply a logical change record (LCR) in a transaction until another transaction, on which it has a dependency, is applied. This state is possible only if the PARALLELISM apply process parameter is set to a value greater than 1.

  • WAIT FOR NEXT CHUNK - Waiting for the next set of logical change records (LCRs) for a large transaction

XIDUSN NUMBER Transaction ID undo segment number of the transaction currently being applied
XIDSLT NUMBER Transaction ID slot number of the transaction currently being applied
XIDSQN NUMBER Transaction ID sequence number of the transaction currently being applied
COMMITSCN NUMBER Commit system change number (SCN) of the transaction currently being applied
DEP_XIDUSN NUMBER Transaction ID undo segment number of a transaction on which the transaction being applied by this apply server depends
DEP_XIDSLT NUMBER Transaction ID slot number of a transaction on which the transaction being applied by this apply server depends
DEP_XIDSQN NUMBER Transaction ID sequence number of a transaction on which the transaction being applied by this apply server depends
DEP_COMMITSCN NUMBER Commit system change number (SCN) of the transaction on which this apply server depends
MESSAGE_SEQUENCE NUMBER Number of the current message being applied by the apply server. This value is reset to 1 at the beginning of each transaction.
TOTAL_ASSIGNED NUMBER Total number of transactions assigned to the apply server since the apply process was last started
TOTAL_ADMIN NUMBER Total number of administrative jobs done by the apply server since the apply process was last started. See the STATE information in this view for the types of administrative jobs.
TOTAL_ROLLBACKS NUMBER Number of transactions assigned to this server which were rolled back
TOTAL_MESSAGES_APPLIED NUMBER Total number of messages applied by this apply server since the apply process was last started
APPLY_TIME DATE Time the last message was applied
APPLIED_MESSAGE_NUMBER NUMBER Number of the last message applied
APPLIED_MESSAGE_CREATE_TIME DATE Creation time at the source database of the last captured message applied. No information about user-enqueued messages is recorded in this column.
ELAPSED_DEQUEUE_TIME NUMBER Time elapsed (in hundredths of a second) dequeuing messages since the apply process was last started
ELAPSED_APPLY_TIME NUMBER Time elapsed (in hundredths of a second) applying messages since the apply process was last started

Note:

The ELAPSED_DEQUEUE_TIME and ELAPSED_APPLY_TIME columns are only populated if the TIMED_STATISTICS initialization parameter is set to true, or if the STATISTICS_LEVEL initialization parameter is set to TYPICAL or ALL.