Rate Limiter Configuration
Limiter is a new feature introduced in EMQX 5.0, it is a mechanism to restrict the number of messages that a client or topic can publish or subscribe to in a specified time. For more information on the Limiter and how it works, see Rate Limit.
For the moment, you can restrict the message rates from the following perspectives:
| Type | Dashboard UI | Description | Recovery Behavior |
|---|---|---|---|
bytes_rate | Data Publish Rate | Incoming message size in bytes per second per client | Pause receiving client messages |
messages_rate | Messages Publish Rate | Incoming messages per second per client | Pause receiving client messages |
max_conn_rate | Maximum Connection Rate | Connections per second per listener | Pause receiving new connections |
For example, to set a limiter for the default TCP listener, you can use the configuration below:
bash
listeners.tcp.default {
bind = "0.0.0.0:1883"
max_conn_rate = "1000/s"
messages_rate = "1000/s"
bytes_rate = "1MB/s"
}TIP
EMQX offers more configuration items to serve customized needs better. For details, see the EMQX Open Source Configuration Manual and EMQX Enterprise Configuration Manual for Enterprise.