diff --git a/etc/emqx.conf b/etc/emqx.conf
index 7876be59b..6370e7214 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -197,7 +197,7 @@ node.async_threads = 32
 ## Value: Number [1024-134217727]
 ##
 ## vm.args: +P Number
-node.process_limit = 256000
+node.process_limit = 2048000
 
 ## Sets the maximum number of simultaneously existing ports for this system.
 ##
@@ -206,7 +206,7 @@ node.process_limit = 256000
 ## Value: Number [1024-134217727]
 ##
 ## vm.args: +Q Number
-node.max_ports = 256000
+node.max_ports = 1024000
 
 ## Set the distribution buffer busy limit (dist_buf_busy_limit).
 ##
@@ -879,7 +879,7 @@ listener.tcp.internal.acceptors = 4
 ## Maximum number of concurrent MQTT/TCP connections.
 ##
 ## Value: Number
-listener.tcp.internal.max_connections = 10240000
+listener.tcp.internal.max_connections = 1024000
 
 ## Maximum internal connections per second.
 ##