Throttling warning but can’t understand why

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Posted on by Theoriginal1981

Hi all,

I've got an issue with a Power Automate that I've deployed. It has run twice now and each time I keep getting a throttling warning.

I've got a QR code which people scan to confirm attendance at an event which takes them to a form. Once complete it compare this to their entry on a SharePoint list, and using PA, updates various fields.

The issue is the delegate size is 50, and clearly when everyone is scanning the QR code the demand is quite large for background API requests. My flows in PA is not necessarily large, and I've used ODATA queries to make them as efficient as possible.

I know Automate has a limit of 500 requests in a single flow, and I am no where near that. I've checked and Concurrency control is off which If I understand right means it will be trying to run all requests at the same time. The information is not time sensitive, so having a small delay when it updates should not be an issue.

Would turning this on and setting it to 1, sort out the issue for me? or is there other things I need to consider or amend here.

Thanks all :-)

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Michael E. Gernaey 53,362 Super User 2025 Season 2 on at

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Hi,

Without the flow itself along with the details it's hard to say.

You could in fact turn on Concurrency for the flow and set it to 1 or 5 and it would in fact lower your overall simultaneous processing and your issue may go away, but it may also make people go nuts ;-) waiting on it to actually work, since I dont know if this is from an App(Canvas Or model) or Power pages etc that they scan the QR code from?

Is it an HTTP EndPoint Trigger? and it runs synchronously to their request and then responds?

Depending on what you are doing and how, you could have an endpoint that just captures the request and writes it to a list in SharePoint, then have another Flow Trigger on new items (and limit how many it runs at a time. This way hopefully no one gets throttled inputting their request to check, but has a small delay in getting the answer in the UI

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lbendlin 8,479 Super User 2025 Season 2 on at

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What else is happening in your environment? Any other flows consuming these request slots?

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