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Oracle® Database Advanced Replication Management API Reference
10g Release 1 (10.1)

Part Number B10733-01
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Contains information about the parallel propagation currently in progress at the replication site. Use this view to determine which transactions are currently being propagated, the number of calls propagated in each transaction, and the current activity of the parallel propagation slave processes or parallel propagation coordinator process.


This view only contains data when deferred transactions are being pushed using parallel propagation at the current site. The parallelism parameter must be set to 1 or higher in the DBMS_DEFER_SYS.PUSH function for a push to use parallel propagation. Otherwise, the push uses serial propagation, and no data appears in this view during the push.

Column Datatype Description



Session identifier.



Session serial number. Used to identify uniquely a session's objects. Guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.



Replication Parallel Prop Slave n indicates that the slave process is active, either waiting, pushing deferred transactions, purging metadata, or creating an error transaction.

Replication Parallel Prop Coordinator indicates that the coordinator process is active, either waiting, sleeping, or scheduling slaves to perform operations.

The Replication Parallel Prop Coordinator reads transactions from the deferred transaction queue and assigns them to the Replication Parallel Prop Slaves. Then, the slaves propagate the transactions to the destination site. When the slaves push transactions in a push session, the slaves remain active until the push session completes, even if there are no more transactions to push.



Database link on which this replication session is propagating.



WAIT indicates that either the slave or coordinator process is waiting for an event (that is, a message).

SLEEP indicates that the coordinator process is sleeping for the duration of the delay_seconds setting. You set delay_seconds with the SCHEDULE_PUSH procedure in the DBMS_DEFER_SYS package.

PUSH indicates that the slave process is pushing transactions from the deferred transaction queue to the remote site.

PURGE indicates that the slave process is purging metadata related to successfully applied transactions from the remote site.

CREATE ERROR indicates that the slave process is creating an error transaction. In this case, an error or a conflict occurred while the slave was pushing deferred transactions to the remote site.

SCHEDULE TXN indicates that the coordinator process is determining the order that transactions are applied and assigning slave processes to execute the transactions.



If the session is a slave session, then indicates the transaction id of the transaction that the slave is currently propagating.



If the process is a slave process, then the sequence number of the calls propagated in the current operation, if relevant. Each transaction must process one or more calls, and the value of SEQUENCE starts at zero and increases as each call is processed. So, the SEQUENCE value shows the call that is currently being processed in each transaction. This value increases until the slave has processed all of the calls in a transaction.