Azure functions: queue configurations

Question

I have an Azure queue, and I am noticing that lots of messages come out all together. Is there a way that I can de-queue the messages maybe one at a time?

Also, how can I set the queue to process the items that go in the poison queue only two times rather than five times, which seems to the default right now.

Everywhere that I check, it talks about updating the function.json file which I don't even see in my Visual Studio instance. It seems like it gets configured at run time based on my settings in local.settings.json.

I have been updating only my local.settings.json file. My host.json only has version:2.0 in it.

Where can I change the configurations of my Azure queue?

Joey Cai · Accepted Answer · 2019-06-13 06:05:33Z

1

Where can I change the configurations of my azure queue?

As the new case said, you could set the following configuration in host.json.

{
    "version": "2.0",
    "extensions": {
        "queues": {
            "maxPollingInterval": "00:00:02",
            "batchSize": 1,
            "maxDequeueCount": 2
        }
    }
}

For more details, you could refer to this article.

answered Jun 13, 2019 at 6:05

Joey Cai

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7 Comments

Sarah Over a year ago

Thanks Joey for your help on this. If I had two queues and want different configurations for each one, how will this work? Like if I want batchsize of 2 for queue 1 and batchsize of 6 for queue 2. Is there a way to specify the name of the queue, these configurations are for?

Sarah Over a year ago

One more question, I used what you recommended and added them to host.json and published my functions to azure portal, how can I check to confirm that my batchsize in fact is 1.

Joey Cai Over a year ago

For the first question, it's no.The host.json metadata file contains global configuration options that affect all functions for a function app. So if you want host.json for different function, you have to have two function on azure.

Joey Cai Over a year ago

For the second one, you could go to appsettings to check the batchsize. Also, you could use Monitor to check it.

Joey Cai Over a year ago

webjob have Queue triggers with different batch sizes. You could refer to this issue.

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