Here are some of the more interesting configurable cluster properties

akka-cluster-config

# Here are some of the more interesting configurable cluster properties 
# that enable you to maintain health of your system

# Note: The provider to use
akka.actor.provider = akka.cluster.ClusterActorRefProvider

akka.cluster {
  
  # if after this duration no heartbeat has been received, you have a problem
  failure-detector.acceptable-heartbeat-pause = 5s
  
  # how often the node publishes heartbeats 
  failure-detector.heartbeat-interval = 1s
  
  # how often the nodes share information with each other
  # and updates to overall cluster state occur 
  gossip-interval = 500 ms
   
  # how often the reaper will move unreachable nodes from the node ring 
  unreachable-nodes-reaper-interval = 1s

  # tell the cluster when a joining node has failed
  # if it has not become a member by this time
  join-timeout = 60s

}