Oracle ADG ，DGBroker管理，异常断电重启主备库的状态
Oracle ADG ，DGBroker管理，异常断电重启主备库的状态
在前面3期文章中，分别做了ORACLE 19C 的静默安装，ORACLE 19C ADG的搭建配置，DG BROKER的配置。
系统运行正常。
在这一期的文章中，我们将演示在主备机器都异常断电的情况下，数据库的状态，DGBROKER的状态，以及数据是否丢失等。
链接: oracle19c dgbroker配置全过程，附命令参数解析【实践分享不留坑】
链接: oracle 19c搭建dataguard(ADG)全过程
链接: Oracle19c 静默安装全过程
- 先启动主库
[oracle@mgrser1 ~]$ lsnrctl startLSNRCTL for Linux: Version 19.0.0.0.0 - Production on 04-NOV-2025 02:37:16Copyright (c) 1991, 2019, Oracle. All rights reserved.Starting /oradb/oracle/product/19.3/dbhome_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 19.0.0.0.0 - Production
System parameter file is /oradb/oracle/product/19.3/dbhome_1/network/admin/listener.ora
Log messages written to /oradb/oracle/diag/tnslsnr/mgrser1/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=mgrser1)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=mgrser1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date 04-NOV-2025 02:37:18
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oradb/oracle/product/19.3/dbhome_1/network/admin/listener.ora
Listener Log File /oradb/oracle/diag/tnslsnr/mgrser1/listener/alert/log.xml
Listening Endpoints Summary...(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=mgrser1)(PORT=1521)))(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "woo" has 1 instance(s).Instance "woo", status UNKNOWN, has 1 handler(s) for this service...
Service "woo_DGMGRL" has 1 instance(s).Instance "woo", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@mgrser1 ~]$ sqlplus / as sysdbaSQL*Plus: Release 19.0.0.0.0 - Production on Tue Nov 4 02:37:23 2025
Version 19.3.0.0.0Copyright (c) 1982, 2019, Oracle. All rights reserved.Connected to an idle instance.SQL> startup
ORACLE instance started.Total System Global Area 2466249672 bytes
Fixed Size 8899528 bytes
Variable Size 536870912 bytes
Database Buffers 1912602624 bytes
Redo Buffers 7876608 bytes
Database mounted.
Database opened.
SQL>
2、启动备库
[root@mgrser2 ~]# su - oracle
Last login: Sun Nov 2 22:17:44 EST 2025 on pts/1
[oracle@mgrser2 ~]$ lsnrctl startLSNRCTL for Linux: Version 19.0.0.0.0 - Production on 04-NOV-2025 02:37:17Copyright (c) 1991, 2019, Oracle. All rights reserved.Starting /oradb/oracle/product/19.3/dbhome_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 19.0.0.0.0 - Production
System parameter file is /oradb/oracle/product/19.3/dbhome_1/network/admin/listener.ora
Log messages written to /oradb/oracle/diag/tnslsnr/mgrser2/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=mgrser2)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=mgrser2)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date 04-NOV-2025 02:37:19
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oradb/oracle/product/19.3/dbhome_1/network/admin/listener.ora
Listener Log File /oradb/oracle/diag/tnslsnr/mgrser2/listener/alert/log.xml
Listening Endpoints Summary...(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=mgrser2)(PORT=1521)))(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "woo" has 1 instance(s).Instance "woo", status UNKNOWN, has 1 handler(s) for this service...
Service "woostd_DGMGRL" has 1 instance(s).Instance "woo", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@mgrser2 ~]$ sqlplus / as sysdbaSQL*Plus: Release 19.0.0.0.0 - Production on Tue Nov 4 02:37:23 2025
Version 19.3.0.0.0Copyright (c) 1982, 2019, Oracle. All rights reserved.Connected to an idle instance.SQL> startup
ORACLE instance started.Total System Global Area 2466249672 bytes
Fixed Size 8899528 bytes
Variable Size 536870912 bytes
Database Buffers 1912602624 bytes
Redo Buffers 7876608 bytes
Database mounted.
Database opened.
SQL> 3、查看主备库状态以及DG同步状态
SQL> select database_role,open_mode from v$database;DATABASE_ROLE OPEN_MODE
---------------- --------------------
PRIMARY READ WRITESQL> SQL> select database_role,open_mode from v$database;DATABASE_ROLE OPEN_MODE
---------------- --------------------
PHYSICAL STANDBY READ ONLY WITH APPLYSQL> --主库切换日志SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 31
Next log sequence to archive 33
Current log sequence 33
SQL> alter system switch logfile;System altered.SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 32
Next log sequence to archive 34
Current log sequence 34
SQL>
SQL> SQL>
SQL> select process,status,sequence# from v$managed_standby;PROCESS STATUS SEQUENCE#
--------- ------------ ----------
ARCH CONNECTED 0
DGRD ALLOCATED 0
DGRD ALLOCATED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CLOSING 32
RFS IDLE 33
RFS IDLE 0
RFS IDLE 0
MRP0 APPLYING_LOG 3310 rows selected.SQL> /PROCESS STATUS SEQUENCE#
--------- ------------ ----------
ARCH CONNECTED 0
DGRD ALLOCATED 0
DGRD ALLOCATED 0
ARCH CONNECTED 0
ARCH CLOSING 33
ARCH CLOSING 32
RFS IDLE 34
RFS IDLE 0
RFS IDLE 0
MRP0 APPLYING_LOG 3410 rows selected.SQL>
4、查看DGBROKER 正常
DGMGRL> show configuration;Configuration - woo_broker_cfgProtection Mode: MaxPerformanceMembers:woo - Primary databasewoostd - Physical standby database Fast-Start Failover: DisabledConfiguration Status:
SUCCESS (status updated 18 seconds ago)DGMGRL> show configuration verbose;Configuration - woo_broker_cfgProtection Mode: MaxPerformanceMembers:woo - Primary databasewoostd - Physical standby database Properties:FastStartFailoverThreshold = '30'OperationTimeout = '30'TraceLevel = 'USER'FastStartFailoverLagLimit = '30'CommunicationTimeout = '180'ObserverReconnect = '0'FastStartFailoverAutoReinstate = 'TRUE'FastStartFailoverPmyShutdown = 'TRUE'BystandersFollowRoleChange = 'ALL'ObserverOverride = 'FALSE'ExternalDestination1 = ''ExternalDestination2 = ''PrimaryLostWriteAction = 'CONTINUE'ConfigurationWideServiceName = 'woo_CFG'Fast-Start Failover: DisabledConfiguration Status:
SUCCESSDGMGRL>