Views Pertinent to DataGuard Configurations

The following are the views that are pertinent to DataGuard Configurations that are categorised for logical and/or physical standby databases.

*Views for LOGICAL DATABASE ONLY

DBA_LOGSTDBY_EVENTS
Logical only
Contains information about the activity of a logical standby database. It can be used to determine the cause of failures that occur when SQL Apply is applying redo to a logical standby database.

DBA_LOGSTDBY_HISTORY
Logical only
Displays the history of switchovers and failovers for logical standby databases in a Data Guard configuration. It does this by showing the complete sequence of redo log streams processed or created on the local system, across all role transitions. (After a role transition, a new log stream is started and the log stream sequence number is incremented by the new primary database.)

DBA_LOGSTDBY_LOG
Logical only
Shows the log files registered for logical standby databases.

DBA_LOGSTDBY_NOT_UNIQUE
Logical only
Identifies tables that have no primary and no non-null unique indexes.

DBA_LOGSTDBY_PARAMETERS
Logical only
Contains the list of parameters used by SQL Apply.

DBA_LOGSTDBY_SKIP
Logical only
Lists the tables that will be skipped by SQL Apply.

DBA_LOGSTDBY_SKIP_TRANSACTION
Logical only
Lists the skip settings chosen.

DBA_LOGSTDBY_UNSUPPORTED
Logical only
Identifies the schemas and tables (and columns in those tables) that contain unsupported data types. Use this view when you are preparing to create a logical standby database.

V$LOGSTDBY_PROCESS
Logical only
Provides dynamic information about what is happening with SQL Apply. This view is very helpful when you are diagnosing performance problems during SQL Apply on the logical standby database, and it can be helpful for other problems.

V$LOGSTDBY_PROGRESS
Logical only
Displays the progress of SQL Apply on the logical standby database.

V$LOGSTDBY_STATE
Logical only
Consolidates information from the V$LOGSTDBY_PROCESS and V$LOGSTDBY_STATS views about the running state of SQL Apply and the logical standby database.

V$LOGSTDBY_STATS
Logical only
Displays LogMiner statistics, current state, and status information for a logical standby database during SQL Apply. If SQL Apply is not running, the values for the statistics are cleared.

V$LOGSTDBY_TRANSACTION
Logical only
Displays information about all active transactions being processed by SQL Apply on the logical standby database.


*Views for PHYSICAL DATABASE ONLY

V$MANAGED_STANDBY
Physical only
Displays current status information for Oracle database processes related to physical standby databases.
Note: The information in this view does not persist across an instance shutdown.


*Views for PRIMARY, PHYSICAL AND LOGICAL DATABASES

V$ARCHIVE_DEST
Primary, physical, and logical
Describes all of the destinations in the Data Guard configuration, including each destination’s current value, mode, and status.
Note: The information in this view does not persist across an instance shutdown.

V$ARCHIVE_DEST_STATUS
Primary, physical, and logical
Displays runtime and configuration information for the archived redo log destinations.
Note: The information in this view does not persist across an instance shutdown.

V$ARCHIVE_GAP
Physical and logical
Displays information to help you identify a gap in the archived redo log files.

V$ARCHIVED_LOG
Primary, physical, and logical
Displays archive redo log information from the control file, including names of the archived redo log files.

V$DATABASE
Primary, physical, and logical
Provides database information from the control file. Includes information about fast-start failover (available only with the Data Guard broker).

V$DATABASE_INCARNATION
Primary, physical, and logical
Displays information about all database incarnations. Oracle Database creates a new incarnation whenever a database is opened with the RESETLOGS option. Records about the current and the previous incarnation are also contained in the V$DATABASE view.

V$DATAFILE
Primary, physical, and logical
Provides datafile information from the control file.

V$DATAGUARD_CONFIG
Primary, physical, and logical
Lists the unique database names defined with the DB_UNIQUE_NAME and LOG_ARCHIVE_CONFIG initialization parameters.

V$DATAGUARD_STATS
Primary, physical, and logical
Displays how much redo data generated by the primary database is not yet available on the standby database, showing how much redo data could be lost if the primary database were to crash at the time you queried this view. You can query this view on any instance of a standby database in a Data Guard configuration. If you query this view on a primary database, then the column values are cleared.

V$DATAGUARD_STATUS
Primary, physical, and logical
Displays and records events that would typically be triggered by any message to the alert log or server process trace files.

V$LOG
Primary, physical, and logical
Contains log file information from the online redo log files.

V$LOGFILE
Primary, physical, and logical
Contains information about the online redo log files and standby redo log files.

V$LOG_HISTORY
Primary, physical, and logical
Contains log history information from the control file.

V$STANDBY_LOG
Physical and logical
Contains log file information from the standby redo log files.

References: Oracle® Data Guard Concepts and Administration 10g Release 2 (10.2)
B14239-05

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