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articles/azure-functions/durable/durable-functions-azure-storage-provider.md

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You should 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-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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* Set the [always ready instance count](../flex-consumption-how-to.md#set-always-ready-instance-counts) for the `durable` group to `1`. This ensures that there is always one instance ready to handle Durable Functions related requests, thus reducing the application's cold start.
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* Reduce the [queue polling interval](durable-functions-azure-storage-provider.md#queue-polling) to 10 seconds or less. Since this plan type is more sensitive to queue polling delays, lowering the polling interval will help increase the frequency of polling operations, thus ensuring requests are handled faster. However, more frequent polling operations will lead to a higher Azure Storage account cost.
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### High throughput processing
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articles/azure-functions/durable/durable-functions-storage-providers.md

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| Price-performance configurable? | ❌ No | ✅ Yes (Event Hubs TUs and CUs) | ✅ Yes (SQL vCPUs) |
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| Disconnected environment support | ❌ Azure connectivity required | ❌ Azure connectivity required | ✅ Fully supported |
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| Identity-based connections | ✅ Fully supported |❌ Not supported | ⚠️ Requires runtime-driven scaling |
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| [Flex Consumption plan](../flex-consumption-plan.md) | ✅ Fully supported |❌ Not supported | ❌ Not supported |
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| [Flex Consumption plan](../flex-consumption-plan.md) | ✅ Fully supported ([see notes](./durable-functions-azure-storage-provider.md#flex-consumption-plan)) |❌ Not supported | ❌ Not supported |
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## Next steps
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articles/azure-functions/flex-consumption-plan.md

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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**: 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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+ **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. See [recommendations](./durable/durable-functions-azure-storage-provider.md#flex-consumption-plan) when hosting Durable Functions in the Flex Consumption plan.
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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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