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> The CPU core values shown are typical allocations for instances with the specified memory size. However, initial instances might be granted slightly different core allocations to improve performance. Each Flex Consumption instance also includes an additional 272 MB of memory allocated by the platform as a buffer for system and host processes. This additional memory doesn't affect billing, and instances are billed based on the configured instance memory size shown in the table above.
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> The CPU core values shown are typical allocations for instances with the specified memory size. However, initial instances might be granted slightly different core allocations to improve performance. Each Flex Consumption instance also includes an extra 272 MB of memory allocated by the platform as a buffer for system and host processes. This extra memory doesn't affect billing, and instances are billed based on the configured instance memory size shown in the preceding table.
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When deciding on which instance memory size to use with your apps, here are some things to consider:
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@@ -89,7 +89,7 @@ All other functions in the app are scaled individually in their own set of insta
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Flex Consumption includes an _always ready_ feature that lets you choose instances that are always running and assigned to each of your per-function scale groups or functions. Always ready is a great option for scenarios where you need to have a minimum number of instances always ready to handle requests. For example, to reduce your application's cold start latency. The default is 0 (zero).
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For example, if you set always ready to 2 for your HTTP group of functions, the platform keeps two instances always running and assigned to your app for your HTTP functions in the app. Those instances are processing your function executions, but depending on concurrency settings, the platform scales beyond those two instances with on-demand instances.
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For example, if you set always ready to 2 for your HTTP group of functions, the platform keeps two instances always running for those functions. Those instances process your function executions first. Depending on concurrency settings, the platform scales beyond those two instances with on-demand instances.
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No less than two always-ready instances can be configured per function or function group while [zone redundancy is enabled](../reliability/reliability-functions.md?pivots=flex-consumption-plan#availability-zone-support).
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## Deployment
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Deployments in the Flex Consumption plan follow a single path, and there's no longer the need for app settings to influence deployment behavior. After your project code is built and zipped into an application package, it's deployed to a blob storage container. On startup, your app gets the package and runs your function code from this package. By default, the same storage account used to store internal host metadata (AzureWebJobsStorage) is also used as the deployment container. However, you can use an alternative storage account or choose your preferred authentication method by [configuring your app's deployment settings](flex-consumption-how-to.md#configure-deployment-settings).
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Deployments in the Flex Consumption plan follow a single path, and there's no longer the need for app settings to influence deployment behavior. Your project code is built and zipped into an application package, then deployed to a blob storage container. On startup, your app gets the package and runs your function code from this package. By default, the same storage account used to store internal host metadata (AzureWebJobsStorage) is also used as the deployment container. However, you can use an alternative storage account or choose your preferred authentication method by [configuring your app's deployment settings](flex-consumption-how-to.md#configure-deployment-settings).
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### Zero-downtime deployments
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## Regional subscription memory quotas
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All Flex Consumption apps in a subscription and region share a compute quota — like a shared bucket of resources. This quota limits how much total compute your Flex Consumption apps can use at the same time. If your apps try to exceed the quota, some executions might be delayed or fail and apps will be throttled from scaling, but you won't be blocked from creating or deploying apps.
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All Flex Consumption apps in a subscription and region share a compute quota, like a shared bucket of resources. This quota applies only to Flex Consumption apps — other hosting plans like Consumption, Premium, and Dedicated don't count against it. The quota limits how much total compute your Flex Consumption apps can use at the same time. If your apps try to exceed the quota, some executions and deployments might be delayed or fail, and scaling is throttled. However, you can still create new apps.
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### Default quota
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## Deprecated properties and settings
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In the Flex Consumption plan, many of the standard application settings and site configuration properties are deprecated or have moved and shouldn't be used when automating function app resource creation. For more information, see [Flex Consumption plan deprecations](functions-app-settings.md#flex-consumption-plan-deprecations).
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In the Flex Consumption plan, many standard application settings and site configuration properties are deprecated or moved. Don't use these settings when you automate function app resource creation. For more information, see [Flex Consumption plan deprecations](functions-app-settings.md#flex-consumption-plan-deprecations).
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## Considerations
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+**Triggers**: While all triggers are fully supported in a Flex Consumption plan, 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](./extension-bundles.md), 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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+**Deployments**: Deployment slots aren't currently supported. For zero downtime deployments with Flex Consumption, see [Site update strategies in Flex Consumption](flex-consumption-site-updates.md).
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+**Azure Storage as a local share**: NFS file shares are not available for Flex Consumption. Only SMB and Azure Blobs (read-only) are supported.
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+**Azure Storage as a local share**: Network File System (NFS) file shares aren't available for Flex Consumption. Only Server Message Block (SMB) and Azure Blobs (read-only) are supported.
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+**Scale**: The lowest maximum scale is currently `40`. The highest currently supported value is `1000`.
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+**Managed dependencies**: [Managed dependencies in PowerShell](functions-reference-powershell.md#managed-dependencies-feature) aren't supported by Flex Consumption. You must instead [upload modules with app content](functions-reference-powershell.md#including-modules-in-app-content).
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+**Managed dependencies**: Flex Consumption doesn't support [managed dependencies in PowerShell](functions-reference-powershell.md#managed-dependencies-feature). You must instead [upload modules with app content](functions-reference-powershell.md#including-modules-in-app-content).
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+**Certificates**: Loading certificates with the WEBSITE_LOAD_CERTIFICATES app setting, managed certificates, app service certificates, and other platform certificate-based features like endToEndEncryptionEnabled are currently not supported.
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+**Timezones**: `WEBSITE_TIME_ZONE` and `TZ` app settings aren't currently supported when running on Flex Consumption plan.
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