ratelimit.rst

Rate Limit

EMQ X Enterprise Edition supports rate limit in multiple aspects to ensure stability of the system.

Max Cocurrent Connections

MQTT TCP or SSL lister, set the maximum concurrent connections:

## Maximum number of concurrent MQTT/TCP connections.
##
## Value: Number
listener.tcp.<name>.max_clients = 102400

## Maximum number of concurrent MQTT/SSL connections.
##
## Value: Number
listener.ssl.<name>.max_clients = 102400

Max Connection Rate

MQTT TCP or SSL listener, set the maximum allowed connecting speed. It is set to 1000 connenctions per seconde by default:

## Maximum external connections per second.
##
## Value: Number
listener.tcp.<name>.max_conn_rate = 1000

## Maximum MQTT/SSL connections per second.
##
## Value: Number
listener.ssl.<name>.max_conn_rate = 1000

Traffic Rate Limit

MQTT TCP or SSL listener, set rate limit for a single connection:

## Rate limit for the external MQTT/TCP connections. Format is 'rate,burst'.
##
## Value: rate,burst
## Unit: Bps
## listener.tcp.<name>.rate_limit = 1024,4096

## Rate limit for the external MQTT/SSL connections.
##
## Value: rate,burst
## Unit: Bps
## listener.ssl.<name>.rate_limit = 1024,4096

Publish Rate Limit

MQTT TCP or SSL listenern, set message publishing rate limit for a single connection:

## Maximum publish rate of MQTT messages.
##
## Value: Number,Seconds
## Default: 10 messages per minute
## listener.tcp.<name>.max_publish_rate = 10,60

## Maximum publish rate of MQTT messages.
##
## See: listener.tcp.<name>.max_publish_rate
##
## Value: Number,Seconds
## Default: 10 messages per minute
## listener.ssl.external.max_publish_rate = 10,60