when you heartbeat, tell me why you think you need it

StackExchange.Redis/PhysicalBridge.cs

@@ -264,7 +264,7 @@ internal void KeepAlive()
             {
                 msg.SetInternalCall();
                 Multiplexer.Trace("Enqueue: " + msg);
-                Multiplexer.OnInfoMessage($"heartbeat '{msg.CommandAndKey}' on '{PhysicalName}' (v{features.Version})");
+                Multiplexer.OnInfoMessage($"heartbeat ({physical?.LastWriteSecondsAgo}s >= {ServerEndPoint?.WriteEverySeconds}s) '{msg.CommandAndKey}' on '{PhysicalName}' (v{features.Version})");
                 physical?.UpdateLastWriteTime(); // pre-emptively
                 var result = TryWrite(msg, ServerEndPoint.IsSlave);