The deadping directive is used to specify how quickly Heartbeat should decide that a ping node in a cluster is dead. Setting this value too low will cause the system to falsely declare the ping node dead. Setting it too high will delay detection of communication failure.
The deadping value is specified according to the HeartbeatTimeSyntax. Two sample deadping specifications are shown below.
deadping 20 # 20 seconds deadping 750ms # 750 milliseconds