Limits on QPS - ApsaraMQ for MQTT - Alibaba Cloud Documentation Center

ApsaraMQ for MQTT limits the frequency at which an API operation is called. The frequency is measured by queries per second (QPS). If the number of requests that you initiate to call an API operation reaches the specified upper limit, throttling is triggered, and your business may be interrupted.

Calls to the API operations on an ApsaraMQ for MQTT broker are limited. The following types of limits are imposed on QPS:

QPS for a single user to call an API operation: If this limit is exceeded, the traffic is throttled. Only traffic that meets the Service Level Agreement (SLA) is guaranteed. For information about the limit on the QPS to call each API operation, see Table 1. QPS for a single user to call an API operation.
Outbound QPS of a single IP address. If this limit is exceeded, the IP address is blocked.
Note
The limit on the outbound QPS of a single IP address is globally applied and is 300 for each API operation.

Table 1. QPS for a single user to call an API operation
API operation	Limit
ApplyToken	100
QueryToken	100
RevokeToken	5
CreateGroupId	10
DeleteGroupId	10
ListGroupId	10
RegisterDeviceCredential	500
GetDeviceCredential	500
UnRegisterDeviceCredential	500
RefreshDeviceCredential	500
QueryMqttTraceDevice	500
QueryMqttTraceMessageOfClient	500
QueryMqttTraceMessagePublish	500
QueryMqttTraceMessageSubscribe	500
SendMessage	1000
QuerySessionByClientId	500
BatchQuerySessionByClientIds	100