Skip Headers
Oracle® Database Advanced Replication Management API Reference
11g Release 1 (11.1)

B28327-03
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Contact Us

Go to previous page
Previous
Go to next page
Next
PDF · Mobi · ePub

24 Replication Dynamic Performance Views

All Oracle installations include the dynamic performance views, often referred to as V$ views, described in this chapter. These views are used by master sites and materialized view sites to determine such information as which materialized views are being refreshed currently and statistics about the deferred transaction queue.

This chapter contains these topics:

See Also:

Chapter 10, "Monitoring a Replication Environment"

V$MVREFRESH

Contains information about the materialized views currently being refreshed.

Column Data Type Description
SID NUMBER Session identifier.
SERIAL# NUMBER Session serial number, which is 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.
CURRMVOWNER VARCHAR2(31) Owner of the materialized view currently being refreshed. The materialized view resides in this user's schema.
CURRMVNAME VARCHAR2(31) Name of the materialized view currently being refreshed.


V$REPLPROP

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 processes or parallel propagation coordinator process.

Note:

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 Data Type Description
SID NUMBER Session identifier.
SERIAL# NUMBER 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.
NAME VARCHAR2(71) Replication Parallel Prop Slave n indicates that the 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 processes 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 processes propagate the transactions to the destination site. When the processes push transactions in a push session, the processes remain active until the push session completes, even if there are no more transactions to push.

DBLINK VARCHAR2(128) Database link on which this replication session is propagating.
STATE VARCHAR2(12) 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.

XID VARCHAR2(22) If the session is a slave session, then indicates the transaction id of the transaction that the slave is currently propagating.
SEQUENCE NUMBER 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.


V$REPLQUEUE

Contains statistics about the replication deferred transactions queue. All values are stored since the start of the current database instance.

Column Data Type Description
TXNS_ENQUEUED NUMBER Number of transactions enqueued in the deferred transactions queue.
CALLS_ENQUEUED NUMBER Number of calls enqueued into the deferred transactions queue.
TXNS_PURGED NUMBER Number of transactions purged from the deferred transactions queue.
LAST_ENQUEUE_TIME DATE Date when the last transaction was enqueued into the deferred transaction queue. NULL if no transactions have been enqueued into the deferred transaction queue since the instance started.
LAST_PURGE_TIME DATE Date when the last transaction was purged from the deferred transaction queue. NULL if no transactions have been purged from the deferred transaction queue since the instance started.