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
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先启动主库
[oracle@mgrser1 ~]$ lsnrctl start
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 04-NOV-2025 02:37:16
Copyright (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 LISTENERAlias 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 start
LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 04-NOV-2025 02:37:17
Copyright (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 sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Tue Nov 4 02:37:23 2025
Version 19.3.0.0.0
Copyright (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$database;
DATABASE_ROLE OPEN_MODE
---------------- --------------------
PRIMARY READ WRITE
SQL>
SQL> select database_role,open_mode from v$database;
DATABASE_ROLE OPEN_MODE
---------------- --------------------
PHYSICAL STANDBY READ ONLY WITH APPLY
SQL>
--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 33
10 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 34
10 rows selected.
SQL> 4、查看DGBROKER 正常
DGMGRL> show configuration;
Configuration - woo_broker_cfg
Protection Mode: MaxPerformance
Members:
woo - Primary database
woostd - Physical standby database
Fast-Start Failover: Disabled
Configuration Status:
SUCCESS (status updated 18 seconds ago)
DGMGRL> show configuration verbose;
Configuration - woo_broker_cfg
Protection Mode: MaxPerformance
Members:
woo - Primary database
woostd - 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: Disabled
Configuration Status:
SUCCESS
DGMGRL>