RMAN备份动态性能视图 V$ARCHIVED_LOG

本视图包含了归档重做日志文件的信息，如归档文件的名称、归档路径等。该视图中数据来自于控制文件，一般是当一个Online Redologs完成归档后，就会在控制文件中插入一条记录，如果归档目录有多个的话，则同时插入对应数量的记录（当然路径肯定不同），另外当通过RMAN恢复归档文件或复制归档文件时，也会插入对应的记录。下面对一些经常使用的列进行说明。


V$ARCHIVED_LOG displays archived log information from the control file, including archive log names. An archive log record is inserted after the online redo log is successfully archived or cleared (name column is NULL if the log was cleared). If the log is archived twice, there will be two archived log records with the same THREAD#, SEQUENCE#, and FIRST_CHANGE#, but with a different name. An archive log record is also inserted when an archive log is restored from a backup set or a copy and whenever a copy of a log is made with the RMAN COPY command.

Column	Datatype	Description
RECID	NUMBER	Archived log record ID
STAMP	NUMBER	Archived log record stamp
NAME	VARCHAR2(513)	Archived log file name. If set to NULL, either the log file was cleared before it was archived or an RMAN backup command with the "delete input" option was executed to back up archivelog all (RMAN> backup archivelog all delete input;). 记录归档文件路径和名称。
DEST_ID	NUMBER	Original destination from which the archive log was generated. The value is 0 if the destination identifier is not available.
THREAD#	NUMBER	Redo thread number 归档线程号，RAC环境下适用。
SEQUENCE#	NUMBER	Redo log sequence number 归档文件序号。
RESETLOGS_CHANGE#	NUMBER	Resetlogs change number of the database when the log was written
RESETLOGS_TIME	DATE	Resetlogs time of the database when the log was written
RESETLOGS_ID	NUMBER	Resetlogs identifier associated with the archived redo log
FIRST_CHANGE#	NUMBER	First change number in the archived log
FIRST_TIME	DATE	Timestamp of the first change 等同于创建时间。
NEXT_CHANGE#	NUMBER	First change in the next log
NEXT_TIME	DATE	Timestamp of the next change
BLOCKS	NUMBER	Size of the archived log (in blocks)
BLOCK_SIZE	NUMBER	Redo log block size. This is the logical block size of the archived log, which is the same as the logical block size of the online log from which the archived log was copied. The online log logical block size is a platform-specific value that is not adjustable by the user.
CREATOR	VARCHAR2(7)	Creator of the archivelog: ARCH - Archiver process FGRD - Foreground process RMAN - Recovery Manager SRMN - RMAN at standby LGWR - Logwriter process 该条记录的创建者（告诉你究竟是哪个进程干的）。 ARCH：表示由归档进程创建。 FGRD：表示由前台进程创建。 RMAN：表示由RMAN创建。 SRMN：表示由Standby端的RMAN创建。 LGWR：表示由Logwriter进程创建。
REGISTRAR	VARCHAR2(7)	Registrar of the entry: RFS - Remote File Server process ARCH - Archiver process FGRD - Foreground process RMAN - Recovery manager SRMN - RMAN at standby LGWR - Logwriter process
STANDBY_DEST	VARCHAR2(3)	Indicates whether the entry is an archivelog destination (YES) or not (NO)
ARCHIVED	VARCHAR2(3)	Indicates whether the online redo log was archived (YES) or whether RMAN only inspected the log and created a record for future application of redo logs during recovery (NO). See Also: Oracle Database Backup and Recovery User's Guide.
APPLIED	VARCHAR2(9)	Indicates whether an archived redo log file has been applied to the corresponding physical standby database. The value is always NO for local destinations. This column is meaningful on a physical standby database for rows whereREGISTRAR = RFS: If REGISTRAR = RFS and APPLIED =NO, then the log file has been received but has not yet been applied. If REGISTRAR = RFS and APPLIED =IN-MEMORY, then the log file has been applied in memory, but the datafiles have not yet been updated. If REGISTRAR = RFS and APPLIED =YES, then the log file has been applied and the datafiles have been updated. This column can be used to identify log files that can be backed up and deleted. When used for this purpose, the value IN-MEMORYshould be treated as if it were NO. 是否被应用，Data Guard环境下适用。
DELETED	VARCHAR2(3)	Indicates whether an RMAN DELETEcommand has physically deleted the archived log file from disk, as well as logically removing it from the control file of the target database and from the recovery catalog (YES) or not (NO)
STATUS	VARCHAR2(1)	Status of the archived log: A - Available D - Deleted U - Unavailable X - Expired A：指正常归档状态。 D：指该记录指向的归档文件已被删除。 U：指该记录指向的归档已不存用。 X：指该条记录失效，通常是当你在RMAN中执行了CROSSCHECK ARCHIVELOG后有可能出现。
COMPLETION_TIME	DATE	Time when the archiving completed
DICTIONARY_BEGIN	VARCHAR2(3)	Indicates whether the log contains the start of a LogMiner dictionary (YES) or not (NO)
DICTIONARY_END	VARCHAR2(3)	Indicates whether the log contains the end of a LogMiner dictionary (YES) or not (NO)
END_OF_REDO	VARCHAR2(3)	Indicates whether the archived redo log contains the end of all redo information from the primary database (YES) or not (NO)
BACKUP_COUNT	NUMBER	Indicates the number of times this file has been backed up. Values range from 0-15. If the file has been backed up more than 15 times, the value remains 15.
ARCHIVAL_THREAD#	NUMBER	Redo thread number of the instance that performed the archival operation. This column differs from the THREAD# column only when a closed thread is archived by another instance.
ACTIVATION#	NUMBER	Number assigned to the database instantiation
IS_RECOVERY_DEST_FILE	VARCHAR2(3)	Indicates whether the file was created in the fast recovery area (YES) or not (NO)
COMPRESSED	VARCHAR2(3)	Reserved for internal use
FAL	VARCHAR2(3)	Indicates whether the archive log was generated as the result of a FAL request (YES) or not (NO)
END_OF_REDO_TYPE	VARCHAR2(10)	Possible values are as follows: SWITCHOVER - Shows archived redo log files that are produced at the end of a switchover TERMINAL - Shows archived redo log files produced after a failover RESETLOGS - Shows online redo log files archived on the primary database after an ALTER DATABASE OPEN RESETLOGS statement is issued ACTIVATION - Shows any log files archived on a physical standby database after an ALTER DATABASE ACTIVATE STANDBY DATABASEstatement is issued "empty string" - Any empty string implies that the log is just a normal archival and was not archived due to any of the other events
BACKED_BY_VSS	VARCHAR2(3)	Whether or not the file has been backed up by Volume Shadow Copy Service (VSS). This column is reserved for internal use.