diff --git a/hbmqtt/broker.py b/hbmqtt/broker.py
index 2b7457e..150afa5 100644
--- a/hbmqtt/broker.py
+++ b/hbmqtt/broker.py
@@ -15,6 +15,7 @@ from hbmqtt.mqtt.connect import ConnectPacket
 from hbmqtt.mqtt.connack import *
 from hbmqtt.errors import HBMQTTException
 from hbmqtt.utils import format_client_message, gen_client_id
+from hbmqtt.mqtt.packet import PUBLISH
 from hbmqtt.codecs import int_to_bytes_str
 from hbmqtt.adapters import (
     StreamReaderAdapter,
@@ -35,7 +36,10 @@ STAT_BYTES_SENT = 'bytes_sent'
 STAT_BYTES_RECEIVED = 'bytes_received'
 STAT_MSG_SENT = 'messages_sent'
 STAT_MSG_RECEIVED = 'messages_received'
+STAT_PUBLISH_SENT = 'publish_sent'
+STAT_PUBLISH_RECEIVED = 'publish_received'
 STAT_UPTIME = 'uptime'
+STAT_CLIENTS_MAXIMUM = 'clients_maximum'
 
 class BrokerException(BaseException):
     pass
@@ -274,7 +278,9 @@ class Broker:
                      STAT_BYTES_SENT,
                      STAT_MSG_RECEIVED,
                      STAT_MSG_SENT,
-                     'clients_connected'):
+                     STAT_CLIENTS_MAXIMUM,
+                     STAT_PUBLISH_RECEIVED,
+                     STAT_PUBLISH_SENT):
             self._stats[stat] = 0
         self._stats[STAT_UPTIME] = datetime.now()
 
@@ -296,7 +302,21 @@ class Broker:
         # Update stats
         uptime = datetime.now() - self._stats[STAT_UPTIME]
         client_connected = sum(1 for k, session in self._sessions.items() if session.machine.state == 'connected')
+        if client_connected > self._stats[STAT_CLIENTS_MAXIMUM]:
+            self._stats[STAT_CLIENTS_MAXIMUM] = client_connected
         client_disconnected = sum(1 for k, session in self._sessions.items() if session.machine.state == 'disconnected')
+        inflight_in = 0
+        inflight_out = 0
+        messages_stored = 0
+        for k, session in self._sessions.items():
+            inflight_in += session.inflight_in_count
+            inflight_out += session.inflight_out_count
+            messages_stored += session.retained_messages_count
+        messages_stored += len(self._global_retained_messages)
+        subscriptions_count = 0
+        for topic in self._subscriptions:
+            subscriptions_count += len(self._subscriptions[topic])
+
         # Broadcast updates
         tasks = [
             self._broadcast_sys_topic('load/bytes/received', int_to_bytes_str(self._stats[STAT_BYTES_RECEIVED])),
@@ -308,6 +328,16 @@ class Broker:
             self._broadcast_sys_topic('uptime/formated', str(uptime).encode('utf-8')),
             self._broadcast_sys_topic('clients/connected', int_to_bytes_str(client_connected)),
             self._broadcast_sys_topic('clients/disconnected', int_to_bytes_str(client_disconnected)),
+            self._broadcast_sys_topic('clients/maximum', int_to_bytes_str(self._stats[STAT_CLIENTS_MAXIMUM])),
+            self._broadcast_sys_topic('clients/total', int_to_bytes_str(client_connected + client_disconnected)),
+            self._broadcast_sys_topic('messages/inflight', int_to_bytes_str(inflight_in + inflight_out)),
+            self._broadcast_sys_topic('messages/inflight/in', int_to_bytes_str(inflight_in)),
+            self._broadcast_sys_topic('messages/inflight/out', int_to_bytes_str(inflight_out)),
+            self._broadcast_sys_topic('messages/inflight/stored', int_to_bytes_str(messages_stored)),
+            self._broadcast_sys_topic('messages/publish/received', int_to_bytes_str(self._stats[STAT_PUBLISH_RECEIVED])),
+            self._broadcast_sys_topic('messages/publish/sent', int_to_bytes_str(self._stats[STAT_PUBLISH_SENT])),
+            self._broadcast_sys_topic('messages/retained/count', int_to_bytes_str(len(self._global_retained_messages))),
+            self._broadcast_sys_topic('messages/subscriptions/count', int_to_bytes_str(subscriptions_count)),
         ]
 
         # Wait until broadcasting tasks end
@@ -627,7 +657,6 @@ class Broker:
         self.logger.debug("Broadcasting message from %s on topic %s" %
                           (format_client_message(session=source_session), topic)
                           )
-        self.logger.debug("Current subscriptions: %s" % repr(self._subscriptions))
         publish_tasks = []
         try:
             for k_filter in self._subscriptions:
@@ -728,9 +757,13 @@ class Broker:
             packet_size = packet.bytes_length
             self._stats[STAT_BYTES_RECEIVED] += packet_size
             self._stats[STAT_MSG_RECEIVED] += 1
+            if packet.fixed_header.packet_type == PUBLISH:
+                self._stats[STAT_PUBLISH_RECEIVED] += 1
 
     def sys_handle_packet_sent(self, packet):
         if packet:
             packet_size = packet.bytes_length
             self._stats[STAT_BYTES_SENT] += packet_size
             self._stats[STAT_MSG_SENT] += 1
+            if packet.fixed_header.packet_type == PUBLISH:
+                self._stats[STAT_PUBLISH_SENT] += 1