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Copy file name to clipboardExpand all lines: articles/azure-functions/functions-app-settings.md
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## WEBSITE_CONTENTAZUREFILECONNECTIONSTRING
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For consumption & Premium plans only. Connection string for storage account where the function app code and configuration are stored. See [Create a function app](functions-infrastructure-as-code.md#create-a-function-app).
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For Consumption & Premium plans only. Connection string for storage account where the function app code and configuration are stored. See [Create a function app](functions-infrastructure-as-code.md#create-a-function-app).
For consumption & Premium plans only. The file path to the function app code and configuration. Used with WEBSITE_CONTENTAZUREFILECONNECTIONSTRING. Default is a unique string that begins with the function app name. See [Create a function app](functions-infrastructure-as-code.md#create-a-function-app).
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For Consumption & Premium plans only. The file path to the function app code and configuration. Used with WEBSITE_CONTENTAZUREFILECONNECTIONSTRING. Default is a unique string that begins with the function app name. See [Create a function app](functions-infrastructure-as-code.md#create-a-function-app).
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-bindings-http-webhook.md
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|Property |Default | Description |
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|---------|---------|---------|
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| customHeaders|none|Allows you to set custom headers in the HTTP response. The previous example adds the `X-Content-Type-Options` header to the response to avoid content type sniffing. |
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|dynamicThrottlesEnabled|true<sup>\*</sup>|When enabled, this setting causes the request processing pipeline to periodically check system performance counters like connections/threads/processes/memory/cpu/etc. and if any of those counters are over a built-in high threshold (80%), requests will be rejected with a 429 "Too Busy" response until the counter(s) return to normal levels.<br/><sup>\*</sup>The default in a consumption plan is `true`. The default in a dedicated plan is `false`.|
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|dynamicThrottlesEnabled|true<sup>\*</sup>|When enabled, this setting causes the request processing pipeline to periodically check system performance counters like connections/threads/processes/memory/cpu/etc. and if any of those counters are over a built-in high threshold (80%), requests will be rejected with a 429 "Too Busy" response until the counter(s) return to normal levels.<br/><sup>\*</sup>The default in a Consumption plan is `true`. The default in a Dedicated plan is `false`.|
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|hsts|not enabled|When `isEnabled` is set to `true`, the [HTTP Strict Transport Security (HSTS) behavior of .NET Core](/aspnet/core/security/enforcing-ssl?view=aspnetcore-3.0&tabs=visual-studio#hsts) is enforced, as defined in the [`HstsOptions` class](/dotnet/api/microsoft.aspnetcore.httpspolicy.hstsoptions?view=aspnetcore-3.0). The above example also sets the [`maxAge`](/dotnet/api/microsoft.aspnetcore.httpspolicy.hstsoptions.maxage?view=aspnetcore-3.0#Microsoft_AspNetCore_HttpsPolicy_HstsOptions_MaxAge) property to 10 days. Supported properties of `hsts` are: <table><tr><th>Property</th><th>Description</th></tr><tr><td>excludedHosts</td><td>A string array of host names for which the HSTS header isn't added.</td></tr><tr><td>includeSubDomains</td><td>Boolean value that indicates whether the includeSubDomain parameter of the Strict-Transport-Security header is enabled.</td></tr><tr><td>maxAge</td><td>String that defines the max-age parameter of the Strict-Transport-Security header.</td></tr><tr><td>preload</td><td>Boolean that indicates whether the preload parameter of the Strict-Transport-Security header is enabled.</td></tr></table>|
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|maxConcurrentRequests|100<sup>\*</sup>|The maximum number of HTTP functions that are executed in parallel. This allows you to control concurrency, which can help manage resource utilization. For example, you might have an HTTP function that uses a lot of system resources (memory/cpu/sockets) such that it causes issues when concurrency is too high. Or you might have a function that makes outbound requests to a third party service, and those calls need to be rate limited. In these cases, applying a throttle here can help. <br/><sup>*</sup>The default for a consumption plan is 100. The default for a dedicated plan is unbounded (`-1`).|
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|maxOutstandingRequests|200<sup>\*</sup>|The maximum number of outstanding requests that are held at any given time. This limit includes requests that are queued but have not started executing, as well as any in progress executions. Any incoming requests over this limit are rejected with a 429 "Too Busy" response. That allows callers to employ time-based retry strategies, and also helps you to control maximum request latencies. This only controls queuing that occurs within the script host execution path. Other queues such as the ASP.NET request queue will still be in effect and unaffected by this setting. <br/><sup>\*</sup>\The default for a consumption plan is 200. The default for a dedicated plan is unbounded (`-1`).|
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|maxConcurrentRequests|100<sup>\*</sup>|The maximum number of HTTP functions that are executed in parallel. This allows you to control concurrency, which can help manage resource utilization. For example, you might have an HTTP function that uses a lot of system resources (memory/cpu/sockets) such that it causes issues when concurrency is too high. Or you might have a function that makes outbound requests to a third party service, and those calls need to be rate limited. In these cases, applying a throttle here can help. <br/><sup>*</sup>The default for a Consumption plan is 100. The default for a Dedicated plan is unbounded (`-1`).|
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|maxOutstandingRequests|200<sup>\*</sup>|The maximum number of outstanding requests that are held at any given time. This limit includes requests that are queued but have not started executing, as well as any in progress executions. Any incoming requests over this limit are rejected with a 429 "Too Busy" response. That allows callers to employ time-based retry strategies, and also helps you to control maximum request latencies. This only controls queuing that occurs within the script host execution path. Other queues such as the ASP.NET request queue will still be in effect and unaffected by this setting. <br/><sup>\*</sup>\The default for a Consumption plan is 200. The default for a Dedicated plan is unbounded (`-1`).|
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|routePrefix|api|The route prefix that applies to all routes. Use an empty string to remove the default prefix. |
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-bindings-microsoft-graph.md
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In both cases, a warning will appear which specifies the extension to be installed. Click **Install** to obtain the extension. Each extension only needs to be installed once per function app.
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> [!Note]
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> The in-portal installation process can take up to 10 minutes on a consumption plan.
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> The in-portal installation process can take up to 10 minutes on a Consumption plan.
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If you are using Visual Studio, you can get the extensions by installing [the NuGet packages that are listed earlier in this article](#packages).
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-bindings-storage-blob.md
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The blob trigger uses a queue internally, so the maximum number of concurrent function invocations is controlled by the [queues configuration in host.json](functions-host-json.md#queues). The default settings limit concurrency to 24 invocations. This limit applies separately to each function that uses a blob trigger.
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[The consumption plan](functions-scale.md#how-the-consumption-and-premium-plans-work) limits a function app on one virtual machine (VM) to 1.5 GB of memory. Memory is used by each concurrently executing function instance and by the Functions runtime itself. If a blob-triggered function loads the entire blob into memory, the maximum memory used by that function just for blobs is 24 * maximum blob size. For example, a function app with three blob-triggered functions and the default settings would have a maximum per-VM concurrency of 3*24 = 72 function invocations.
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[The Consumption plan](functions-scale.md#how-the-consumption-and-premium-plans-work) limits a function app on one virtual machine (VM) to 1.5 GB of memory. Memory is used by each concurrently executing function instance and by the Functions runtime itself. If a blob-triggered function loads the entire blob into memory, the maximum memory used by that function just for blobs is 24 * maximum blob size. For example, a function app with three blob-triggered functions and the default settings would have a maximum per-VM concurrency of 3*24 = 72 function invocations.
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JavaScript and Java functions load the entire blob into memory, and C# functions do that if you bind to `string`, `Byte[]`, or POCO.
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-dotnet-class-library.md
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The build process creates a *function.json* file in a function folder in the build folder. As noted earlier, this file is not meant to be edited directly. You can't change binding configuration or disable the function by editing this file.
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The purpose of this file is to provide information to the scale controller to use for [scaling decisions on the consumption plan](functions-scale.md#how-the-consumption-and-premium-plans-work). For this reason, the file only has trigger info, not input or output bindings.
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The purpose of this file is to provide information to the scale controller to use for [scaling decisions on the Consumption plan](functions-scale.md#how-the-consumption-and-premium-plans-work). For this reason, the file only has trigger info, not input or output bindings.
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The generated *function.json* file includes a `configurationSource` property that tells the runtime to use .NET attributes for bindings, rather than *function.json* configuration. Here's an example:
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-infrastructure-as-code.md
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> [!NOTE]
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> The Consumption plan cannot be explicitly defined for Linux. It will be created automatically.
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If you do explicitly define your consumption plan, you will need to set the `serverFarmId` property on the app so that it points to the resource ID of the plan. You should ensure that the function app has a `dependsOn` setting for the plan as well.
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If you do explicitly define your Consumption plan, you will need to set the `serverFarmId` property on the app so that it points to the resource ID of the plan. You should ensure that the function app has a `dependsOn` setting for the plan as well.
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### Create a function app
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## Deploy on Premium plan
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The Premium plan offers the same scaling as the consumption plan but includes dedicated resources and additional capabilities. To learn more, see [Azure Functions Premium Plan](./functions-premium-plan.md).
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The Premium plan offers the same scaling as the Consumption plan but includes dedicated resources and additional capabilities. To learn more, see [Azure Functions Premium Plan](./functions-premium-plan.md).
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-reference-node.md
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## Scaling and concurrency
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By default, Azure Functions automatically monitors the load on your application and creates additional host instances forNode.js as needed. Functions uses built-in (not user configurable) thresholds for different trigger types to decide when to add instances, such as the age of messages and queue size forQueueTrigger. For more information, see [How the consumption and premium plans work](functions-scale.md#how-the-consumption-and-premium-plans-work).
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By default, Azure Functions automatically monitors the load on your application and creates additional host instances forNode.js as needed. Functions uses built-in (not user configurable) thresholds for different trigger types to decide when to add instances, such as the age of messages and queue size forQueueTrigger. For more information, see [How the Consumption and Premium plans work](functions-scale.md#how-the-consumption-and-premium-plans-work).
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This scaling behavior is sufficient for many Node.jsapplications. ForCPU-bound applications, you can improve performance further by using multiple language worker processes.
Copy file name to clipboardExpand all lines: articles/azure-functions/functions-reference-python.md
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## Scaling and concurrency
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By default, Azure Functions automatically monitors the load on your application and creates additional host instances for Python as needed. Functions uses built-in (not user configurable) thresholds for different trigger types to decide when to add instances, such as the age of messages and queue size for QueueTrigger. For more information, see [How the consumption and premium plans work](functions-scale.md#how-the-consumption-and-premium-plans-work).
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By default, Azure Functions automatically monitors the load on your application and creates additional host instances for Python as needed. Functions uses built-in (not user configurable) thresholds for different trigger types to decide when to add instances, such as the age of messages and queue size for QueueTrigger. For more information, see [How the Consumption and Premium plans work](functions-scale.md#how-the-consumption-and-premium-plans-work).
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This scaling behavior is sufficient for many applications. Applications with any of the following characteristics, however, may not scale as effectively:
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