How to Safely Remove a Data Guard Broker Configuration under RAC/NON-RAC setup

1) Remove the Data Guard Broker Configuration

Using the Commandline DGMGRL
SQL> show parameter dg_broker;
NAME                                 TYPE        VALUE
———————————— ———– ——————————
dg_broker_config_file1               string      /mnt/data/oradata/PROD/dr1PROD.dat
dg_broker_config_file2               string      /mnt/data/oradata/PROD/dr2PROD.dat
dg_broker_start                      boolean     TRUE

DGMGRL> connect sys/sysgsadm
Connected.
DGMGRL> show configuration;
Configuration – dataguard
Protection Mode: MaxPerformance
Databases:
PROD  – Primary database
PROD – Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS

DGMGRL> remove configuration;
Removed configuration
DGMGRL> show configuration;
ORA-16532: Data Guard broker configuration does not exist
Configuration details cannot be determined by DGMGRL

2) On the primary database set dg_broker_start=false:

SQL> show parameter dg_broker

NAME                                 TYPE        VALUE
———————————— ———– ——————————
dg_broker_config_file1               string      ?/dbs/dr1@.dat
dg_broker_config_file2               string      ?/dbs/dr2@.dat
dg_broker_start                      boolean     TRUE

SQL> alter system set dg_broker_start=false scope=both;

System altered.

SQL> show parameter dg_broker;
NAME                                 TYPE        VALUE
———————————— ———– ——————————
dg_broker_config_file1               string      /mnt/data/oradata/PROD/dr1PROD.dat
dg_broker_config_file2               string      /mnt/data/oradata/PROD/dr2PROD.dat
dg_broker_start                      boolean     TRUE

3) On the primary disable any archive destinations that are archiving to the standby:

SQL> column A format 999;
column B format a40;
column C format a10;
column C word_wrapped;
column D word_wrapped;
select dest_id A,destination B,status C
from v$archive_dest
where target=’STANDBY’;
A B                                        C
—- —————————————- ———-
2 dg_PROD                                VALID

Primary> show parameter log_archive_dest_state_2;
NAME                                 TYPE        VALUE
———————————— ———– ——————————
log_archive_dest_state_2             string      ENABLE

Primary> alter system set log_archive_dest_state_2=defer scope=both;
System altered.

Primary> show parameter log_archive_dest_state_2;
NAME                                 TYPE        VALUE
———————————— ———– ——————————
log_archive_dest_state_2             string      DEFER

4) on the standby set the dg_broker_start parameter to false:

SQL> show parameter dg_broker;
NAME                                 TYPE        VALUE
———————————— ———– ——————————
dg_broker_config_file1               string      /mnt/data/oradata/PROD/dr1PROD.dat
dg_broker_config_file2               string      /mnt/data/oradata/PROD/dr2PROD.dat
dg_broker_start                      boolean     TRUE

SQL> alter system set dg_broker_start=false scope=both;
System altered.

5) On both system remove metadata files

oracle@hasunclu1:/u03/oracle/9.2.0/dbs> rm /mnt/data/oradata/PROD/dr1PROD.dat
oracle@hasunclu1:/u03/oracle/9.2.0/dbs> rm /mnt/data/oradata/PROD/dr2PROD.dat

If required you can activate standby database as below :

Standby> Shutdown abort;

Standby> startup;
ORACLE instance started.
Total System Global Area 9152860160 bytes
Fixed Size                  2234056 bytes
Variable Size            6610225464 bytes
Database Buffers         2516582400 bytes
Redo Buffers               23818240 bytes
Database mounted.
ORA-10456: cannot open standby database; media recovery session may be in progress

SQL> alter database activate standby database;
Database altered.

SQL> startup force;
ORACLE instance started.
Total System Global Area 9152860160 bytes
Fixed Size                  2234056 bytes
Variable Size            6610225464 bytes
Database Buffers         2516582400 bytes
Redo Buffers               23818240 bytes
Database mounted.
Database opened.

[oracle@Node2 PROD]$ srvctl stop database -d PROD
[oracle@Node2 PROD]$ srvctl start database -d PROD

[oracle@Node2 PROD]$ srvctl status instance -d PROD -n Node1
Instance PROD1 is running on node Node1
[oracle@Node2 PROD]$ srvctl status instance -d PROD -n Node2
Instance PROD2 is running on node Node2

The database won’t be opened by srvctl commands as it’s configured for STANDBY mode under Datauard setup.
Please change service mode using srvctl from MOUNT TO OPEN.