9.78 V$STANDBY_LOG

V$STANDBY_LOG displays information about standby redo logs. Standby redo logs are similar to online redo logs, but standby redo logs are only used on a standby database that is receiving redo data from the primary database.

Column	Datatype	Description
GROUP#	NUMBER	Log group number
DBID	VARCHAR2(40)	Database ID of the primary database to which the standby redo logfile is assigned. If the standby redo logfile is unassigned, the value UNASSIGNED will be displayed.
THREAD#	NUMBER	Log thread number
SEQUENCE#	NUMBER	Log sequence number
BYTES	NUMBER	Size of the log (in bytes)
BLOCKSIZE	NUMBER	Block size of the logfile (512 or 4096)
USED	NUMBER	Number of bytes used in the log
ARCHIVED	VARCHAR2(3)	Archive status (YES) or (NO). See the STATUS column for further details.
STATUS	VARCHAR2(10)	Log status: UNASSIGNED - If ARCHIVED is NO, then the standby redo log has been archived and is again available. If ARCHIVED is YES, then the standby redo log has never been used and is available. ACTIVE - If ARCHIVED is NO, then the standby redo log is complete and waiting to be archived. If ARCHIVED is YES, then the standby redo log is currently being written to and is therefore not ready to be archived. For a given thread, there should be only one such log.
FIRST_CHANGE#	NUMBER	Lowest SCN in the log
FIRST_TIME	DATE	Time of the first SCN in the log
NEXT_CHANGE#	NUMBER	All redo records contained within this log will have an SCN lower than NEXT_CHANGE#. Only filled in once the log is complete. Also the lowest SCN of any redo record in the next log.
NEXT_TIME	DATE	All redo records contained within this log will have a timestamp lower than NEXT_TIME. Only filled in once the log is complete. Also the lowest timestamp of any redo record in the next log.
LAST_CHANGE#	NUMBER	All redo records contained within this log will have an SCN lower than LAST_CHANGE#. Only filled in once the log is complete. Also the lowest SCN of any redo record in the next log. LAST_CHANGE# is deprecated. Use NEXT_CHANGE# instead.
LAST_TIME	DATE	All redo records contained within this log will have a timestamp lower than LAST_TIME. Only filled in once the log is complete. Also the lowest timestamp of any redo record in the next log. LAST_TIME is deprecated. Use NEXT_TIME instead.
CON_ID	NUMBER	The ID of the container to which the data pertains. Possible values include: 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. 1: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data