To disable Fast_Start failover apply following command :
When we perform above command Fast_Start failover is first disabled on target standby database with data guard broker then it is disabled from the primary database. Then these changes are propagated to all standby database present in the data guard broker configuration.
We can disable Fast_Start failover to prevent the observer from initiating a failover. If the Primary database and target standby database of Fast_Start failover does not have connectivity we can use FORCE option.
If this DISABLE FAST_START FAILOVER command is applied on primary database or on bystander standby database then it is disabled locally first then it is recorded in data guard broker metadata then data guard broker propagates these changed to all standby database which is configured in data guard broker configuration and has connectivity to the primary database.
Note: Observer is not stopped when we disable Fast_Start Failover.
Disabling specific condition in Fast_Start Failover :
Syntax :
Example: DISABLE FAST_START FAILOVER “Inaccessible Logfile”

Disabling FAST_START failover with FORCE option :

Step 1 :

DGMGRL> show configuration;

Configuration - drdb

Protection Mode: MaxAvailability
std_testdb - Primary database
Error: ORA-16820: fast-start failover observer is no longer observing this database

testdb - (*) Physical standby database (disabled)
ORA-16661: the standby database needs to be reinstated

Fast-Start Failover: ENABLED

Configuration Status:

Step 2: Checking Fast_start failover :

DGMGRL> show fast_start failover;

Fast-Start Failover: ENABLED

Threshold: 50 seconds
Target: testdb
Observer: test1.localdomain
Lag Limit: 50 seconds (not in use)
Shutdown Primary: TRUE
Auto-reinstate: TRUE
Observer Reconnect: (none)
Observer Override: FALSE

Configurable Failover Conditions
Health Conditions:
Corrupted Controlfile YES
Corrupted Dictionary YES
Inaccessible Logfile NO
Stuck Archiver NO
Datafile Offline YES

Oracle Error Conditions:

Step 3: I am trying to disable it in a normal way.

DGMGRL> disable fast_start failover;
Error: ORA-16652: fast-start failover target standby database is disabled


We can see here it returns the error.

Step 4: Stopping it with FORCE option.

DGMGRL> disable fast_start failover force;

Stay tuned for More articles on Oracle DataGuard

Thank you for giving your valuable time to read the above information.

If you want to be updated with all our articles send us the Invitation or Follow us:

Telegram Channel:

Skant Gupta’s LinkedIn:

Joel Perez’s LinkedIn: Joel Perez’s Profile

LinkedIn Group: Oracle Cloud DBAAS

Facebook Page: OracleHelp

About The Author

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.