Azure Event hub outgoing messages throttling

Varun 16 Reputation points
2021-08-20T22:22:04.387+00:00

Hi All,

We have been stress-testing the event hub lately and found a very interesting observation, the outgoing events of the service bus throttles to zero otugoing periodically whereas the incoming events are coming through consistently. I have only one event hub in the namespace with 16 parititions and 14 T.U.s configured.

The event hub serves a processing application which does some heavy processing on incoming events to transform them to a different stream, I have 16 instances of this application running (1 for each partition). Periodically, the AMQP subscription stops sending any new events on all the instances which is later picked up again. I have attached the metrics graph for reference.

125144-image.png

Any help is much appreciated,

Thanks!

Azure Event Hubs
Azure Event Hubs
An Azure real-time data ingestion service.
546 questions
{count} votes