SQL> set sqlprompt "primary>"
primary>show parameter standby_file
NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
standby_file_management              string                 AUTO
--select * from v$parameter where name like 'standby%';

alter tablespace new_dg2  offline;mv /u01/app/oracle/oradata/hongquan/hongquantest/new_dg2.dbf  /u01/app/oracle/oradata/hongquan/hongquantest/new_dg2_test.dbfalter tablespace new_dg2 rename datafile '/u01/app/oracle/oradata/hongquan/hongquantest/new_dg2.dbf' to '/u01/app/oracle/oradata/hongquan/hongquantest/new_dg2_test.dbf';alter tablespace new_dg2  online;alter system switch logfile;  select name from v$datafile;

  alter database recover managed standby database cancel;mv /u02/app/oracle/oradata/hongquan1/hongquantest/new_dg2.dbf  /u02/app/oracle/oradata/hongquan1/hongquantest/new_dg2_test.dbfalter database recover managed standby database disconnect from session;select name from v$datafile;

###带有enable|disable thread子句的alter database命令
V$THREAD --This view contains thread information from the control file.
###当前数据库角色，保护模式，保护级别，switchover 状态，failover快速启动信息等
select * from v$database;
--LOG_MODE,CONTROLFILE_TYPE,OPEN_MODE,PROTECTION_MODE,DATABASE_ROLE,SWITCHOVER_STATUS,FORCE_LOGGING,FLASHBACK_ON,DB_UNIQUE_NAME
--controlfile_type=CURRENT/STANDBY
--PROTECTION_MODE=MAXIMUM PROTECTION/MAXIMUM AVAILABILITY/RESYNCHRONIZATION/MAXIMUM PERFORMANCE/UNPROTECTED
--DATABASE_ROLE=LOGICAL STANDBY/PHYSICAL STANDBY/PRIMARY
--DATAGUARD_BROKER=ENABLED/DISABLED
###redo log 切换
V$LOG/V$LOGFILE
###重建控制文件,手工执行恢复
alert.log
SQL> select * from v$diag_info;
/u01/app/oracle/diag/rdbms/orcl/orcl/trace
###表空间状态修改(read write/read only,online/offline)
select * from dba_tablespaces;
###创建删除表空间或数据文件
select * from dba_data_files;
###表空间或数据文件offline
select * from dba_tablespaces;
select * from v$recover_file; --This view displays the status of files needing media recovery
###重命名数据文件
select * from v$datafile;
###未被日志记录或不可恢复的操作
select * from v$datafile;
select * from v$database;
###恢复的进程
select * from v$archive_dest_status; --主库
select * from v$archived_log;
select * from v$log_history;
select * from v$managed_standby;
###redo传输的状态和进度
select * from v$archive_dest_status; --主库
select * from v$archive_dest; --主库
select * from v$archived_log; --主库
select * from v$archived_log;
###数据文件自动扩展
/u01/app/oracle/diag/rdbms/orcl/orcl/trace
###执行open resetlogs或clear unarchived logfiles，修改初始化参数
/u01/app/oracle/diag/rdbms/orcl/orcl/trace

standby > select process,client_process,sequence#,status from v$managed_standby;
ARCH    ARCH    1846    CLOSING
ARCH    ARCH    0    CONNECTED
MRP0    N/A    1847    APPLYING_LOG
RFS    UNKNOWN    0    IDLE
RFS    UNKNOWN    0    IDLE
RFS    LGWR    1847    IDLE
RFS    UNKNOWN    0    IDLE
--
PROCESS:进程名称，如ARCH\RFS\MRP0等
CLIENT_P:对应的primary数据库中的进程，如ARCH\LGWR等
SEQUENCE#:归档序号
STATUS:进程的当前状态，常见的有：ALLOCATED:整准备连接primary库ATTACHED:正在连接primary库CONNECTED:已连接到primary库IDLE:空闲中RECEIVING:归档文件接收中OPENING:归档文件处理中CLOSING:归档文件处理完，收尾中WRITING:REDO数据库写想归档文件中WAIT_FOR_LOG:等待新的redo数据中WAIT_FOR_GAP:归档有中断，正等待中断的那部分redo数据APPLYING_LOG:应用redo数据中
数据库开了1个归档进程，使用ARCH同步传输方式与物理standby通信，已经接收并收尾处理1846号日志，正在应用1847号日志

standby > select dest_name,archived_thread#,archived_seq#,applied_thread#,applied_seq#,db_unique_name,destination from v$archive_dest_status where status='VALID';
LOG_ARCHIVE_DEST_1    1    1846    0    0    cadbk    C:\app\Administrator\fast_recovery_area\cadbk\ARCHIVELOG
LOG_ARCHIVE_DEST_2    0    0    0    0    CAD    cad_192.168.19.97
STANDBY_ARCHIVE_DEST    1    1846    1    1846    NONE    C:\app\Administrator\fast_recovery_area\cadbk\ARCHIVELOG

standby > select name,creator,sequence#,applied,completion_time from v$archived_log;
C:\APP\ADMINISTRATOR\FAST_RECOVERY_AREA\CADBK\ARCHIVELOG\1_1845_976879612.ARCH    ARCH    1845    YES    2019/6/26 6:04:33
C:\APP\ADMINISTRATOR\FAST_RECOVERY_AREA\CADBK\ARCHIVELOG\1_1846_976879612.ARCH    ARCH    1846    IN-MEMORY    2019/6/26 8:17:32

standby > select first_time,first_change#,next_change#,sequence# from v$log_history;
--查询到最后应用的归档文件
standby > select thread#,max(sequence#) as "last_applied_log" from v$log_history group by thread#;
thread#  last_applied_log
1    1846
--也可以通过v$archived_log中的app列表获得相同的功能
standby > select thread#,sequence#,applied from v$archived_log;
1    1844    YES
1    1845    YES
1    1846    IN-MEMORY

primary > select local.thread#,local.sequence# from  (select thread#,sequence# from v$archived_log where dest_id=1) localwhere local.sequence# not in(select sequence# from v$archived_log where dest_id=2 and thread#=local.thread#);

standby > select database_role,db_unique_name,open_mode,protection_mode,protection_level,
switchover_status from v$database;
PHYSICAL STANDBY    cadbk    READ ONLY WITH APPLY    MAXIMUM PERFORMANCE    MAXIMUM PERFORMANCE    NOT ALLOWED

--查询failover后快速启动的信息
standby > select fs_failover_status,fs_failover_current_target,fs_failover_threshold,
fs_failover_observer_present from v$database;

standby > select process,status,thread#,sequence#,block#,blocks from v$managed_standby;
ARCH    CLOSING    1    1846    90112    347
ARCH    CONNECTED    0    0    0    0
MRP0    APPLYING_LOG    1    1848    1156    102400
RFS    IDLE    0    0    0    0
RFS    IDLE    0    0    0    0
RFS    IDLE    1    1848    1157    2

standby > select recovery_mode from v$archive_dest_status where dest_id=1;
MANAGED REAL TIME APPLY ##打开了实时应用

standby > select message from v$dataguard_status;
Media Recovery Waiting for thread 1 sequence 1847 (in transit)
ARC0: Beginning to archive thread 1 sequence 1847 (40070728-40088719)
Media Recovery Waiting for thread 1 sequence 1848 (in transit)
ARC0: Completed archiving thread 1 sequence 1847 (0-0)