diff --git a/src/emqttd_pubsub.erl b/src/emqttd_pubsub.erl
index 63c4146d7..0f8d3a2c6 100644
--- a/src/emqttd_pubsub.erl
+++ b/src/emqttd_pubsub.erl
@@ -232,7 +232,7 @@ match(Topic) when is_binary(Topic) ->
 %%%=============================================================================
 
 init([Id, _Opts]) ->
-    process_flag(priority, high),
+    %%process_flag(priority, high),
     %%process_flag(min_heap_size, 1024*1024),
     gproc_pool:connect_worker(pubsub, {?MODULE, Id}),
     {ok, #state{id = Id, submap = maps:new()}}.