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Update articles/azure-functions/flex-consumption-plan.md
Co-authored-by: Glenn Gailey <[email protected]>
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articles/azure-functions/flex-consumption-plan.md

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@@ -137,7 +137,9 @@ In Flex Consumption, many of the standard application settings and site configur
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Keep these other considerations in mind when using Flex Consumption plan during the current preview:
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+ **Host**: There is a 30 seconds timeout for the app initialization. If your function app takes longer than 30 seconds to start you will see gRPC related System.TimeoutException entries. This timeout will be configurable and a more clear exception will be implemented as part of [this host work item](https://github.com/Azure/azure-functions-host/issues/10482).
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+ **Durable Functions**: Due to the per function scaling nature of Flex Consumption, to ensure the best performance for Durable Functions we recommend setting the [Always Ready instance count](./flex-consumption-how-to.md#set-always-ready-instance-counts) for the `durable` group to `1`. Also, with the Azure Storage provider, consider reducing the [queue polling interval](./durable/durable-functions-azure-storage-provider.md#queue-polling) to 10 seconds or less. Note that lowering queue polling could cause a small increase in Azure Storage cost. Only Azure Storage is supported as a backend storage provider for Flex Consumption hosted durable functions.
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+ **Durable Functions**: Azure Storage is currently the only supported [storage provider](./durable/durable-functions-storage-providers.md) for Durable Functions when hosted in the Flex Consumption plan. You should also follow these performance recommendations when hosting Durable Functions in the Flex Consumption plan:
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+ Set the [always ready instance count](flex-consumption-how-to.md#set-always-ready-instance-counts) for the `durable` group to `1`.
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+ Reduce the [queue polling interval](./durable/durable-functions-azure-storage-provider.md#queue-polling) to 10 seconds or less. Lowering this interval might cause a small cost increase in your Azure Storage account.
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+ **VNet Integration** Ensure that the `Microsoft.App` Azure resource provider is enabled for your subscription by [following these instructions](/azure/azure-resource-manager/management/resource-providers-and-types#register-resource-provider). The subnet delegation required by Flex Consumption apps is `Microsoft.App/environments`.
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+ **Triggers**: All triggers are fully supported except for Kafka and Azure SQL triggers. The Blob storage trigger only supports the [Event Grid source](./functions-event-grid-blob-trigger.md). Non-C# function apps must use version `[4.0.0, 5.0.0)` of the [extension bundle](./functions-bindings-register.md#extension-bundles), or a later version.
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+ **Regions**: Not all regions are currently supported. To learn more, see [View currently supported regions](flex-consumption-how-to.md#view-currently-supported-regions).

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