Azure Service Bus | More details about prefetchCount and maxConcurrentSessions in ServiceBusClientBuilder.ServiceBusSessionProcessorClientBuilder Class

[prabdeb]

ISSUE:

In document https://docs.microsoft.com/en-us/java/api/com.azure.messaging.servicebus.servicebusclientbuilder.servicebussessionprocessorclientbuilder?view=azure-java-stable it would be good to have the following details about prefetchCount(int prefetchCount) -

• Since we can't disabled the prefetch as per [BUG] Service bus | Can't disable the prefetch count #17681 , what will be the behaviour if we do not set it, how many messages will be prefetched?
• What should be recommended settings? Would this number be related to maxConcurrentCalls(int maxConcurrentCalls)?

In document https://docs.microsoft.com/en-us/java/api/com.azure.messaging.servicebus.servicebusclientbuilder.servicebussessionprocessorclientbuilder?view=azure-java-stable it would be good to have the following details about maxConcurrentSessions(int maxConcurrentSessions) -

• What it does, what will happen if we don't set it?
• If we would like to set it, what would be it's recommended value, will maxConcurrentCalls(int maxConcurrentCalls) have any impact on this configuration settings?

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Document Details

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• ID: 5bf820f1-a84f-99a7-f9bb-37688b63359a
• Version Independent ID: e9cc8b71-1f13-e0ed-85ca-3d681e6c2033
• Content: Azure Service Bus client library for Java
• Content Source: docs-ref-services/latest/messaging-servicebus-readme.md
• Service: servicebus
• Product: azure
• Technology: azure
• GitHub Login: @ramya-rao-a
• Microsoft Alias: ramyar

[ramya-rao-a]

@anuchandy Assigning this to you as you have been investigating the prefetch area recently

[anuchandy]

Related to this - we published a document explaining how prefetch works with sync receiver in this pr #26447

We'll still need to create a Doc / JavaDoc on prefetch relation to the session receiver.

[anuchandy]

The accuracy of this documentation ticket depends on this feature-work 27336. I'm updating 27336 to have a sub-item on this documentation, closing this.