diff --git a/rel/files/emqttd.config b/rel/files/emqttd.config
index e72a06862..eabd4e119 100644
--- a/rel/files/emqttd.config
+++ b/rel/files/emqttd.config
@@ -107,14 +107,16 @@
             {max_awaiting_rel, 0}
 
         ]},
+        %% Session
         {queue, [
-            %% Max queue length
+            %% Max queue length. enqueued messages when persistent client disconnected, 
+            %% or inflight window is full.
             {max_length, 1000},
 
-            %% Low watermark of queued messsages
+            %% Low-water mark of queued messsages
             {low_watermark, 0.2},
 
-            %% High watermark of queued messsages
+            %% High-water mark of queued messsages
             {high_watermark, 0.6},
 
             %% Queue Qos0 messages?
@@ -141,7 +143,8 @@
         %% Bridge
         {bridge, [
             %%TODO: bridge queue size
-            {max_queue_len, 1000},
+            {max_queue_len, 10000},
+
             %% Ping Interval of bridge node
             {ping_down_interval, 1} %seconds
         ]}