V$STREAMS_APPLY_SERVER

V$STREAMS_APPLY_SERVER displays information about each apply server and its activities. An apply server receives messages from the apply coordinator for an apply process. For each message received, an apply server either applies the message or sends the message to the appropriate apply handler. An apply server is a subcomponent of an apply process, outbound server, or inbound server.

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:

  • INITIALIZING - Starting up

  • 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 purges rows that were 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 DEPENDENT_TRANSACTIONS 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.

  • ROLLBACK TRANSACTION - Rolling back a transaction

  • TRANSACTION CLEANUP - Cleaning up an applied transaction, which includes removing LCRs from the apply process's queue

  • WAIT FOR CLIENT - Waiting for an XStream client application to request more LCRs

  • WAIT FOR NEXT CHUNKFoot 1  - Waiting for the next set of 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
COMMIT_POSITION RAW(64) Commit position of the transaction.

This column is populated only for an apply process that is functioning as an XStream outbound server or inbound server.
DEP_COMMIT_POSITION RAW(64) Commit position of the transaction the slave depends on

This column is populated only for an apply process that is functioning as an XStream inbound server.
LAST_APPLY_POSITION RAW(64) For inbound servers, the position of the last message applied; for outbound servers, the position of the last message sent to the XStream client application

This column is populated only for an apply process that is functioning as an XStream outbound server or inbound server.
TRANSACTION_ID VARCHAR2(128) Transaction ID that the slave is applying

This column is populated only for an apply process that is functioning as an XStream inbound server.
DEP_TRANSACTION_ID VARCHAR2(128) Transaction ID of the transaction the slave depends on

This column is populated only for an apply process that is functioning as an XStream inbound server.

Footnote 1 This state is available starting with Oracle Database 11g Release 2 (11.2.0.2).

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.