(mongodb >=1.13.0)
MongoDB\Driver\Monitoring\SDAMSubscriber::serverHeartbeatStarted — Notification method for a started server heartbeat
$event): voidIf the subscriber is registered, this method is called when a server heartbeat (i.e. » hello command issued through » server monitoring) is sent to the server.
event (MongoDB\Driver\Monitoring\ServerHeartbeatStartedEvent)An event object encapsulating information about the started server heartbeat.
没有返回值。