FastStartFailoverLagLimit

The FastStartFailoverLagLimit configuration property establishes an acceptable limit, in seconds, that the standby is allowed to fall behind the primary in terms of redo applied.

Category	Description
Broker default	Maximum performance mode: 30 seconds Maximum availability mode: 0 seconds
Configuration Type	Data Guard only
Datatype	Integer
Property Type	Configurable
Scope	Broker configuration
Valid Role	Primary and standby
Valid value	Must be greater than, or equal to, 5. The FastStartFailoverLagLimit property is not used in maximum protection mode.

Note:

It is recommended to set the FastStartFailoverLagLimit lower than or equal to FastStartFailoverThreshold. When setting FastStartFailoverLagLimit greater than FastStartFailoverThreshold, the primary will keep committing after the Fast-Start Failover is initiated, exposing the configuration to the risk of having two primary databases for a short period of time.

If the limit is reached, then a fast-start failover is not allowed. The lowest possible value is 5 seconds.

This property is used when fast-start failover is enabled and the configuration is operating in maximum performance mode.