How to Define Failover Threshold

FastStartFailoverThreshold: Define Failover Time

Failover occurs if both observer and target standby database lose connection with Primary database for the period of time specified by FastStartFailoverThreshold property. The value of the property is in seconds. Default value is 30 seconds and lowest possible value is 6 seconds.

DGMGRL> edit configuration set property FastStartFailoverThreshold=300;

Property "faststartfailoverthreshold" updated

The command above sets the FastStartFailoverThreshold to 5min. This means, the failover will occur after 5min after Observer and Target Standby lose the connection with Primary. If you want to wait for longer duration to initiate the failover, specify larger value for FastStartFailoverThreshold property.

Here is list of other properties related to Fast Start Failover. In most of the cases the default value is sufficient.

FastStartFailoverLagLimit
FastStartFailoverPmyShutdown
FastStartFailoverAutoReinstate
ObserverOverride
ObserverReconnect
ObserverConnectIdentifier

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