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DC07
Frequent Visitor

Eventsteam custom endpoint(event hub) message size limit

I'm getting an error sending messages to a custom end point in an event stream that the message is too big "The maximum message size quota for outgoing messages (1048576) has been exceeded"

why is the max message size only 1mb? I have the same limit in Azure event hubs.

What other ways can I receive messages in real time that are larger than 1mb

5 REPLIES 5
v-tangjie-msft
Community Support
Community Support

Hi @DC07 ,

 

The 1 MB limit for message size in Azure Event Hubs and similar services is primarily due to performance and reliability considerations. Larger messages can significantly impact the throughput and latency of the system, leading to potential bottlenecks and increased resource consumption.

Quotas and limits - Azure Event Hubs - Azure Event Hubs | Microsoft Learn

 

However, there are ways to handle larger messages in real-time:

1.You can use Azure Event Hubs dedicated clusters, which support large messages up to 20 MB. This feature is currently in public preview and allows you to stream large messages without additional charges.

Quickstart: Send and receive large messages with Azure Event Hubs (preview) - Azure Event Hubs | Mic...

2.Azure Service Bus supports larger messages, with a maximum size of 256 KB in the standard tier and up to 100 MB in the premium tier.

How can we send message size larger than 1MB to EventHub - Microsoft Q&A

3.Split your large messages into smaller chunks that fit within the 1 MB limit and send them as separate messages. You can then reassemble these chunks at the receiving end.

 

Best Regards,

Neeko Tang

If this post  helps, then please consider Accept it as the solution  to help the other members find it more quickly. 

datacoffee
Most Valuable Professional
Most Valuable Professional

On the configuration of the Eventstream you can configure the max message size - this should be the place to change this and have the messages running through 


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where? there is a setting for event throughput, but this has nothing to do with message size

Wenyang
Microsoft Employee
Microsoft Employee

Hi @DC07 ,

 

Thanks for reaching out. You can upgrade your Eventstream throughput by following the steps outlined in Configure settings for a Fabric eventstream - Microsoft Fabric | Microsoft Learn.

Wenyang_0-1739178536131.png

 

Thanks,

Wenyang

datacoffee
Most Valuable Professional
Most Valuable Professional

Sorry my bad - I misunderstood your question. 


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