Edit host and app settings for Standard logic apps in single-tenant Azure Logic Apps

Article
09/26/2024

Applies to: Azure Logic Apps (Standard)

In single-tenant Azure Logic Apps, the app settings for a Standard logic app specify the global configuration options that affect all the workflows in that logic app. However, these settings apply only when these workflows run in your local development environment. Locally running workflows can access these app settings as local environment variables, which are used by local development tools for values that can often change between environments. For example, these values can contain connection strings. When you deploy to Azure, app settings are ignored and aren't included with your deployment.

Your logic app also has host settings, which specify the runtime configuration settings and values that apply to all the workflows in that logic app, for example, default values for throughput, capacity, data size, and so on, whether they run locally or in Azure.

App settings, parameters, and deployment

In multitenant Azure Logic Apps, deployment depends on Azure Resource Manager templates (ARM templates), which combine and handle resource provisioning for both logic apps and infrastructure. This design poses a challenge when you have to maintain environment variables for logic apps across various dev, test, and production environments. Everything in an ARM template is defined at deployment. If you need to change just a single variable, you have to redeploy everything.

In single-tenant Azure Logic Apps, deployment becomes easier because you can separate resource provisioning between apps and infrastructure. You can use parameters to abstract values that might change between environments. By defining parameters to use in your workflows, you can first focus on designing your workflows, and then insert your environment-specific variables later. You can call and reference your environment variables at runtime by using app settings and parameters. That way, you don't have to redeploy as often.

App settings integrate with Azure Key Vault. You can directly reference secure strings, such as connection strings and keys. Similar to Azure Resource Manager templates (ARM templates), where you can define environment variables at deployment time, you can define app settings within your logic app workflow definition. You can then capture dynamically generated infrastructure values, such as connection endpoints, storage strings, and more. However, app settings have size limitations and can't be referenced from certain areas in Azure Logic Apps.

Note

If you use Key Vault, make sure that you store only secrets, such as passwords, credentials, and certificates. In a logic app workflow, don't use Key Vault to store non-secret values, such as URL paths, that the workflow designer needs to make calls. The designer can't dereference an app setting that references a Key Vault resource type, which results in an error and a failed call. For non-secret values, store them directly in app settings.

For more information about setting up your logic apps for deployment, see the following documentation:

Visual Studio Code project structure

In Visual Studio Code, your logic app project has either of the following types:

Extension bundle-based (Node.js), which is the default type
NuGet package-based (.NET), which you can convert from the default type

Based on these types, your project includes slightly different folders and files. A NuGet-based project includes a .bin folder that contains packages and other library files. A bundle-based project doesn't include the .bin folder and other files. Some scenarios require a NuGet-based project for your app to run, for example, when you want to develop and run custom built-in operations. For more information about converting your project to use NuGet, review Enable built-connector authoring.

For the default bundle-based project, your project has a folder and file structure that is similar to the following example:

MyBundleBasedLogicAppProjectName
| .vscode
| Artifacts
  || Maps 
     ||| MapName1
     ||| ...
  || Schemas
     ||| SchemaName1
     ||| ...
| WorkflowName1
  || workflow.json
  || ...
| WorkflowName2
  || workflow.json
  || ...
| workflow-designtime
| .funcignore
| connections.json
| host.json
| local.settings.json

At your project's root level, you can find the following files and folders with other items:

Name	Folder or file	Description
.vscode	Folder	Contains Visual Studio Code-related settings files, such as extensions.json, launch.json, settings.json, and tasks.json files.
Artifacts	Folder	Contains integration account artifacts that you define and use in workflows that support business-to-business (B2B) scenarios. For example, the example structure includes maps and schemas for XML transform and validation operations.
*<WorkflowName>*	Folder	For each workflow, the <WorkflowName> folder includes a workflow.json file, which contains that workflow's underlying JSON definition.
workflow-designtime	Folder	Contains development environment-related settings files.
.funcignore	File	Contains information related to your installed Azure Functions Core Tools.
connections.json	File	Contains the metadata, endpoints, and keys for any managed connections and Azure functions that your workflows use. Important: To use different connections and functions for each environment, make sure that you parameterize this connections.json file and update the endpoints.
host.json	File	Contains runtime-specific configuration settings and values, for example, the default limits for the single-tenant Azure Logic Apps platform, logic apps, workflows, triggers, and actions. At your logic app project's root level, the host.json metadata file contains the configuration settings and default values that all workflows in the same logic app use while running, whether locally or in Azure. Note: When you create your logic app, Visual Studio Code creates a backup *host.snapshot..json** file in your storage container. If you delete your logic app, this backup file isn't deleted. If you create another logic app with the same name, another snapshot file is created. You can have only up to 10 snapshots for the same logic app. If you exceed this limit, you get the following error: `Microsoft.Azure.WebJobs.Script.WebHost: Repository has more than 10 non-decryptable secrets backups (host))` To resolve this error, delete the extra snapshot files from your storage container.
local.settings.json	File	Contains app settings, connection strings, and other settings that your workflows use while running locally. In other words, these settings and values apply only when you run your projects in your local development environment. During deployment to Azure, the file and settings are ignored and aren't included with your deployment. This file stores settings and values as local environment variables that are used by your local development tools as the `appSettings` values. You can call and reference these environment variables both at runtime and deployment time by using app settings and parameters. Important: The local.settings.json file can contain secrets, so make sure that you also exclude this file from your project source control.

Reference for app settings - local.settings.json

In Visual Studio Code, at your logic app project's root level, the local.settings.json file contain global configuration options that affect all workflows in that logic app while running in your local development environment. When your workflows run locally, these settings are accessed as local environment variables, and their values can often change between the various environments where you run your workflows. To view and manage these settings, review Manage app settings - local.settings.json.

App settings in Azure Logic Apps work similarly to app settings in Azure Functions or Azure Web Apps. If you've used these other services before, you might already be familiar with app settings. For more information, review App settings reference for Azure Functions and Work with Azure Functions Core Tools - Local settings file.

For your workflow to run properly, some app settings are required.

Setting	Required	Value	Description
`APP_KIND`	Yes	`workflowApp`	Required to set the app type for the Standard logic app resource. The value must be set to `workflowApp`. Note: In some scenarios, this app setting might be missing, for example, due to automation using Azure Resource Manager templates or other scenarios where the setting isn't included. If certain actions don't work, such as the Execute JavaScript Code action, or if the workflow stops working, check that the APP_KIND app setting exists and is set to to `workflowApp`.
`AzureWebJobsStorage`	Yes	None	Required to set the connection string for an Azure storage account. For more information, see AzureWebJobsStorage.
`FUNCTINONS_EXTENSION_VERSION`	Yes	`~4`	Required to set the Azure Functions version. For more information, see FUNCTIONS_EXTENSION_VERSION.
`FUNCTIONS_WORKER_RUNTIME`	Yes	`dotnet`	Required to set the language worker runtime for your logic app resource and workflows. Note: This setting's value was previously set to `node`, but now the required value is `dotnet` for all new and existing deployed Standard logic apps. This change shouldn't affect your workflow's runtime, so everything should work the same way as before. For more information, see FUNCTIONS_WORKER_RUNTIME.
`ServiceProviders.Sftp.FileUploadBufferTimeForTrigger`	No	`00:00:20` (20 seconds)	Sets the buffer time to ignore files that have a last modified timestamp that's greater than the current time. This setting is useful when large file writes take a long time and avoids fetching data for a partially written file.
`ServiceProviders.Sftp.OperationTimeout`	No	`00:02:00` (2 min)	Sets the time to wait before timing out on any operation.
`ServiceProviders.Sftp.ServerAliveInterval`	No	`00:30:00` (30 min)	Sends a "keep alive" message to keep the SSH connection active if no data exchange with the server happens during the specified period.
`ServiceProviders.Sftp.SftpConnectionPoolSize`	No	`2` connections	Sets the number of connections that each processor can cache. The total number of connections that you can cache is ProcessorCount multiplied by the setting value.
`ServiceProviders.MaximumAllowedTriggerStateSizeInKB`	No	`10` KB, which is ~1,000 files	Sets the trigger state entity size in kilobytes, which is proportional to the number of files in the monitored folder and is used to detect files. If the number of files exceeds 1,000, increase this value.
`ServiceProviders.Sql.QueryTimeout`	No	`00:02:00` (2 min)	Sets the request timeout value for SQL service provider operations.
`WEBSITE_CONTENTSHARE`	Yes	Dynamic	Required to set the name for the file share that Azure Functions uses to store function app code and configuration files and is used with WEBSITE_CONTENTAZUREFILECONNECTIONSTRING. The default is a unique string generated by the runtime. For more information, see WEBSITE_CONTENTSHARE.
`WEBSITE_LOAD_ROOT_CERTIFICATES`	No	None	Sets the thumbprints for the root certificates to be trusted.
`Workflows.Connection.AuthenticationAudience`	No	None	Sets the audience for authenticating a managed (Azure-hosted) connection.
`Workflows.CustomHostName`	No	None	Sets the host name to use for workflow and input-output URLs, for example, "logic.contoso.com". For information to configure a custom DNS name, see Map an existing custom DNS name to Azure App Service and Secure a custom DNS name with a TLS/SSL binding in Azure App Service.
`Workflows.<workflowName>.FlowState`	No	None	Sets the state for <workflowName>.
`Workflows.<workflowName>.RuntimeConfiguration.RetentionInDays`	No	None	Sets the amount of time in days to keep the run history for <workflowName>.
`Workflows.RuntimeConfiguration.RetentionInDays`	No	`90` days	Sets the amount of time in days to keep workflow run history after a run starts.
`Workflows.WebhookRedirectHostUri`	No	None	Sets the host name to use for webhook callback URLs.

Manage app settings - local.settings.json

To add, update, or delete app settings, select and review the following sections for Azure portal, Visual Studio Code, Azure CLI, or ARM (Bicep) template. For app settings specific to logic apps, review the reference guide for available app settings - local.settings.json.

View app settings in the portal

In the Azure portal search box, find and open your logic app.
On your logic app menu, under Settings, select Environment variables.
On the Environment variables page, on the App settings tab, review the app settings for your logic app.

For more information about these settings, review the reference guide for available app settings - local.settings.json.
To view all values, select Show Values. Or, to view a single value, in the Value column, next to the value, select the "eye".

Add an app setting in the portal

On the App settings tab, at the bottom of the list, in the Name column, enter the key or name for your new setting.
For Value, enter the value for your new setting.
When you're ready to create your new key-value pair, select Apply.

View app settings in Visual Studio Code

In your logic app project, at the root project level, find and open the local.settings.json file.
In the Values object, review the app settings for your logic app.

For more information about these settings, review the reference guide for available app settings - local.settings.json.

Add an app setting in Visual Studio Code

In the local.settings.json file, find the Values object.
In the Values object, add the app setting that you want to apply when running locally in Visual Studio Code. Some settings enable you to add a setting for a specific workflow, for example:
```
{
   "IsEncrypted": false,
   "Values": {
      "AzureWebJobsStorage": "UseDevelopmentStorage=true",
      "Workflows.WorkflowName1.FlowState" : "Disabled",
      <...>
  }
}
```

To review your current app settings using the Azure CLI, run the command, az logicapp config appsettings list. Make sure that your command includes the --name -n and --resource-group -g parameters, for example:

az logicapp config appsettings list --name MyLogicApp --resource-group MyResourceGroup

For more information about these settings, review the reference guide for available app settings - local.settings.json.

To add or update an app setting using the Azure CLI, run the command az logicapp config appsettings set. Make sure that your command includes the --name n and --resource-group -g parameters. For example, the following command creates a setting with a key named CUSTOM_LOGIC_APP_SETTING with a value of 12345:

az logicapp config appsettings set --name MyLogicApp --resource-group MyResourceGroup --settings CUSTOM_LOGIC_APP_SETTING=12345

Reference for host settings - host.json

In Visual Studio Code, at your logic app project's root level, the host.json metadata file contains the runtime settings and default values that apply to all workflows in a logic app resource whether running locally or in Azure. To view and manage these settings, review Manage host settings - host.json. You can also find related limits information in the Limits and configuration for Azure Logic Apps documentation.

Job orchestration throughput

These settings affect the throughput and capacity for single-tenant Azure Logic Apps to run workflow operations.

Setting	Default value	Description
`Jobs.BackgroundJobs.DispatchingWorkersPulseInterval`	`00:00:01` (1 sec)	Sets the interval for job dispatchers to poll the job queue when the previous poll returns no jobs. Job dispatchers poll the queue immediately when the previous poll returns a job.
`Jobs.BackgroundJobs.NumPartitionsInJobDefinitionsTable`	`4` job partitions	Sets the number of job partitions in the job definition table. This value controls how much execution throughput is affected by partition storage limits.
`Jobs.BackgroundJobs.NumPartitionsInJobTriggersQueue`	`1` job queue	Sets the number of job queues monitored by job dispatchers for jobs to process. This value also affects the number of storage partitions where job queues exist.
`Jobs.BackgroundJobs.NumWorkersPerProcessorCount`	`192` dispatcher worker instances	Sets the number of dispatcher worker instances or job dispatchers to have per processor core. This value affects the number of workflow runs per core.
`Jobs.BackgroundJobs.StatelessNumWorkersPerProcessorCount`	`192` dispatcher worker instances	Sets the number of dispatcher worker instances or job dispatchers to have per processor core, per stateless run. This value affects the number of concurrent workflow actions that are processed per run.

Both of the following settings are used to manually stop and immediately delete the specified workflows in Standard logic app.

Note

Use these settings with caution and only in non-production environments, such as load or performance test environments, as you can't undo or recover from these operations.

Setting	Default value	Description
`Jobs.CleanupJobPartitionPrefixes`	None	Immediately deletes all the run jobs for the specified workflows.
`Jobs.SuspendedJobPartitionPartitionPrefixes`	None	Stops the run jobs for the specified workflows.

The following example shows the syntax for these settings where each workflow ID is followed by a colon (:) and separated by a semicolon (;):

"Jobs.CleanupJobPartitionPrefixes": "<workflow-ID-1>:; <workflow-ID-2:",
"Jobs.SuspendedJobPartitionPrefixes": "<workflow-ID-1>:; <workflow-ID-2>:"

Recurrence-based triggers

Setting	Default value	Description
`Microsoft.Azure.Workflows.ServiceProviders.MaximumAllowedTriggerStateSizeInKB`	`1` KB	Sets the trigger state's maximum allowed size for recurrence-based triggers such as the built-in SFTP trigger. The trigger state persists data across multiple service provider recurrence-based triggers. Important: Based on your storage size, avoid setting this value too high, which can adversely affect storage and performance.

Trigger concurrency

The following settings work only for workflows that start with a recurrence-based trigger for built-in, service provider-based connectors. For a workflow that starts with a function-based trigger, you might try to set up batching where supported. However, batching isn't always the correct solution. For example, with Azure Service Bus triggers, a batch might hold onto messages beyond the lock duration. As a result, any action, such as complete or abandon, fails on such messages.

Setting	Default value	Description
`Runtime.Trigger.MaximumRunConcurrency`	`100` runs	Sets the maximum number of concurrent runs that a trigger can start. This value appears in the trigger's concurrency definition.
`Runtime.Trigger.MaximumWaitingRuns`	`200` runs	Sets the maximum number of runs that can wait after concurrent runs meet the maximum. This value appears in the trigger's concurrency definition. For more information, see Change waiting runs limit.

Run duration and history retention

Setting	Default value	Description
`Runtime.Backend.FlowRunTimeout`	`90.00:00:00` (90 days)	Sets the amount of time a workflow can continue running before forcing a timeout. The minimum value for this setting is 7 days. Important: Make sure this value is less than or equal to the value for the app setting named `Workflows.RuntimeConfiguration.RetentionInDays`. Otherwise, run histories can get deleted before the associated jobs are complete.
`Runtime.FlowMaintenanceJob.RetentionCooldownInterval`	`7.00:00:00` (7 days)	Sets the amount of time in days as the interval between when to check for and delete run history that you no longer want to keep.

Run actions

Setting	Default value	Description
`Runtime.FlowRunRetryableActionJobCallback.ActionJobExecutionTimeout`	`00:10:00` (10 minutes)	Sets the amount of time for a workflow action job to run before timing out and retrying.

Inputs and outputs

Setting	Default value	Description
`Microsoft.Azure.Workflows.TemplateLimits.InputParametersLimit`	`50`	Change the default limit on cross-environment workflow parameters up to 500 for Standard logic apps created by exporting Consumption logic apps.
`Runtime.ContentLink.MaximumContentSizeInBytes`	`104857600` bytes	Sets the maximum size in bytes that an input or output can have in a single trigger or action.
`Runtime.FlowRunActionJob.MaximumActionResultSize`	`209715200` bytes	Sets the maximum size in bytes that the combined inputs and outputs can have in a single action.

Pagination

Setting	Default value	Description
`Runtime.FlowRunRetryableActionJobCallback.MaximumPageCount`	`1000` pages	When pagination is supported and enabled on an operation, sets the maximum number of pages to return or process at runtime.

Chunking

Setting	Default value	Description
`Runtime.FlowRunRetryableActionJobCallback.MaximumContentLengthInBytesForPartialContent`	`1073741824` bytes	When chunking is supported and enabled on an operation, sets the maximum size in bytes for downloaded or uploaded content.
`Runtime.FlowRunRetryableActionJobCallback.MaxChunkSizeInBytes`	`52428800` bytes	When chunking is supported and enabled on an operation, sets the maximum size in bytes for each content chunk.
`Runtime.FlowRunRetryableActionJobCallback.MaximumRequestCountForPartialContent`	`1000` requests	When chunking is supported and enabled on an operation, sets the maximum number of requests that an action execution can make to download content.

Store content inline or use blobs

Setting	Default value	Description
`Runtime.FlowRunEngine.ForeachMaximumItemsForContentInlining`	`20` items	When a `For each` loop is running, each item's value is stored either inline with other metadata in table storage or separately in blob storage. Sets the number of items to store inline with other metadata.
`Runtime.FlowRunRetryableActionJobCallback.MaximumPagesForContentInlining`	`20` pages	Sets the maximum number of pages to store as inline content in table storage before storing in blob storage.
`Runtime.FlowTriggerSplitOnJob.MaximumItemsForContentInlining`	`40` items	When the `SplitOn` setting debatches array items into multiple workflow instances, each item's value is stored either inline with other metadata in table storage or separately in blob storage. Sets the number of items to store inline.
`Runtime.ScaleUnit.MaximumCharactersForContentInlining`	`8192` characters	Sets the maximum number of operation input and output characters to store inline in table storage before storing in blob storage.

For each loops

Setting	Default value	Description
`Runtime.Backend.FlowDefaultForeachItemsLimit`	`100000` array items	For a stateful workflow, sets the maximum number of array items to process in a `For each` loop.
`Runtime.Backend.FlowDefaultSplitOnItemsLimit`	`100000` array items	Sets the maximum number of array items to debatch or split into multiple workflow instances based on the `SplitOn` setting.
`Runtime.Backend.ForeachDefaultDegreeOfParallelism`	`20` iterations	Sets the default number of concurrent iterations, or degree of parallelism, in a `For each` loop. To run sequentially, set the value to `1`.
`Runtime.Backend.Stateless.FlowDefaultForeachItemsLimit`	`100` items	For a stateless workflow, sets the maximum number of array items to process in a `For each` loop.

Until loops

Setting	Default value	Description
`Runtime.Backend.MaximumUntilLimitCount`	`5000` iterations	For a stateful workflow, sets the maximum number possible for the `Count` property in an `Until` action.
`Runtime.Backend.Stateless.FlowRunTimeout`	`00:05:00` (5 min)	Sets the maximum wait time for an `Until` loop in a stateless workflow.
`Runtime.Backend.Stateless.MaximumUntilLimitCount`	`100` iterations	For a stateless workflow, sets the maximum number possible for the `Count` property in an `Until` action.

Variables

Setting	Default value	Description
`Runtime.Backend.DefaultAppendArrayItemsLimit`	`100000` array items	Sets the maximum number of items in a variable with the Array type.
`Runtime.Backend.VariableOperation.MaximumStatelessVariableSize`	Stateless workflow: `1024` characters	Sets the maximum size in characters for the content that a variable can store when used in a stateless workflow.
`Runtime.Backend.VariableOperation.MaximumVariableSize`	Stateful workflow: `104857600` characters	Sets the maximum size in characters for the content that a variable can store when used in a stateful workflow.

Built-in HTTP operations

Setting	Default value	Description
`Runtime.Backend.HttpOperation.DefaultRetryCount`	`4` retries	Sets the default retry count for HTTP triggers and actions.
`Runtime.Backend.HttpOperation.DefaultRetryInterval`	`00:00:07` (7 sec)	Sets the default retry interval for HTTP triggers and actions.
`Runtime.Backend.HttpOperation.DefaultRetryMaximumInterval`	`01:00:00` (1 hour)	Sets the maximum retry interval for HTTP triggers and actions.
`Runtime.Backend.HttpOperation.DefaultRetryMinimumInterval`	`00:00:05` (5 sec)	Sets the minimum retry interval for HTTP triggers and actions.
`Runtime.Backend.HttpOperation.MaxContentSize`	`104857600` bytes	Sets the maximum request size in bytes for HTTP actions only, not triggers. For more information, see Limitations.
`Runtime.Backend.HttpOperation.RequestTimeout`	`00:03:45` (3 min and 45 sec) Note: The default value is also the maximum value.	Sets the request timeout value for HTTP triggers and actions.

Built-in HTTP Webhook operations

Setting	Default value	Description
`Runtime.Backend.HttpWebhookOperation.DefaultRetryCount`	`4` retries	Sets the default retry count for HTTP webhook triggers and actions.
`Runtime.Backend.HttpWebhookOperation.DefaultRetryInterval`	`00:00:07` (7 sec)	Sets the default retry interval for HTTP webhook triggers and actions.
`Runtime.Backend.HttpWebhookOperation.DefaultRetryMaximumInterval`	`01:00:00` (1 hour)	Sets the maximum retry interval for HTTP webhook triggers and actions.
`Runtime.Backend.HttpWebhookOperation.DefaultRetryMinimumInterval`	`00:00:05` (5 sec)	Sets the minimum retry interval for HTTP webhook triggers and actions.
`Runtime.Backend.HttpWebhookOperation.DefaultWakeUpInterval`	`01:00:00` (1 hour)	Sets the default wake-up interval for HTTP webhook trigger and action jobs.
`Runtime.Backend.HttpWebhookOperation.MaxContentSize`	`104857600` bytes	Sets the maximum request size in bytes for HTTP webhook actions only, not triggers. For more information, see Limitations.
`Runtime.Backend.HttpWebhookOperation.RequestTimeout`	`00:02:00` (2 min)	Sets the request timeout value for HTTP webhook triggers and actions.

Built-in Azure Storage operations

Blob storage

Setting	Default value	Description
`Microsoft.Azure.Workflows.ContentStorage.RequestOptionsThreadCount`	None	Sets the thread count for blob upload and download operations. You can use this setting to force the Azure Logic Apps runtime to use multiple threads when uploading and downloading content from action inputs and outputs.
`Runtime.ContentStorage.RequestOptionsDeltaBackoff`	`00:00:02` (2 sec)	Sets the backoff interval between retries sent to blob storage.
`Runtime.ContentStorage.RequestOptionsMaximumAttempts`	`4` retries	Sets the maximum number of retries sent to table and queue storage.
`Runtime.ContentStorage.RequestOptionsMaximumExecutionTime`	`00:02:00` (2 min)	Sets the operation timeout value, including retries, for blob requests from the Azure Logic Apps runtime.
`Runtime.ContentStorage.RequestOptionsServerTimeout`	`00:00:30` (30 sec)	Sets the timeout value for blob requests from the Azure Logic Apps runtime.

Table and queue storage

Setting	Default value	Description
`Runtime.DataStorage.RequestOptionsDeltaBackoff`	`00:00:02` (2 sec)	Sets the backoff interval between retries sent to table and queue storage.
`Runtime.DataStorage.RequestOptionsMaximumAttempts`	`4` retries	Sets the maximum number of retries sent to table and queue storage.
`Runtime.DataStorage.RequestOptionsMaximumExecutionTime`	`00:00:45` (45 sec)	Sets the operation timeout value, including retries, for table and queue storage requests from the Azure Logic Apps runtime.
`Runtime.DataStorage.RequestOptionsServerTimeout`	`00:00:16` (16 sec)	Sets the timeout value for table and queue storage requests from the Azure Logic Apps runtime.

Setting	Default value	Description
`ServiceProviders.AzureFile.MaxFileSizeInBytes`	`150000000` bytes	Sets the maximum file size in bytes for an Azure file share.

Built-in Azure Functions operations

Setting	Default value	Description
`Runtime.Backend.FunctionOperation.RequestTimeout`	`00:03:45` (3 min and 45 sec)	Sets the request timeout value for Azure Functions actions.
`Runtime.Backend.FunctionOperation.MaxContentSize`	`104857600` bytes	Sets the maximum request size in bytes for Azure Functions actions. For more information, see Limitations.
`Runtime.Backend.FunctionOperation.DefaultRetryCount`	`4` retries	Sets the default retry count for Azure Functions actions.
`Runtime.Backend.FunctionOperation.DefaultRetryInterval`	`00:00:07` (7 sec)	Sets the default retry interval for Azure Functions actions.
`Runtime.Backend.FunctionOperation.DefaultRetryMaximumInterval`	`01:00:00` (1 hour)	Sets the maximum retry interval for Azure Functions actions.
`Runtime.Backend.FunctionOperation.DefaultRetryMinimumInterval`	`00:00:05` (5 sec)	Sets the minimum retry interval for Azure Functions actions.

Built-in Azure Service Bus operations

Setting	Default value	Description
`ServiceProviders.ServiceBus.MessageSenderOperationTimeout`	`00:01:00` (1 min)	Sets the timeout for sending messages with the built-in Service Bus operation.
`Runtime.ServiceProviders.ServiceBus.MessageSenderPoolSizePerProcessorCount`	`64` message senders	Sets the number of Azure Service Bus message senders per processor core to use in the message sender pool.

Built-in SFTP operations

Setting	Default value	Description
`Runtime.ServiceProviders.Sftp.MaxFileSizeInBytes`	`2147483648` bytes	Sets the maximum file size in bytes for the Get file content (V2) action.
`Runtime.ServiceProviders.Sftp.MaximumFileSizeToReadInBytes`	`209715200` bytes	Sets the maximum file size in bytes for the Get file content action. Make sure this value doesn't exceed the referenceable memory size because this action reads file content in memory.

Managed connector operations

Setting	Default value	Description
`Runtime.Backend.ApiConnectionOperation.RequestTimeout`	`00:02:00` (2 min)	Sets the request timeout value for managed API connector triggers and actions.
`Runtime.Backend.ApiConnectionOperation.MaxContentSize`	`104857600` bytes	Sets the maximum request size in bytes for managed API connector triggers and actions. For more information, see Limitations.
`Runtime.Backend.ApiConnectionOperation.DefaultRetryCount`	`4` retries	Sets the default retry count for managed API connector triggers and actions.
`Runtime.Backend.ApiConnectionOperation.DefaultRetryInterval`	`00:00:07` (7 sec)	Sets the default retry interval for managed API connector triggers and actions.
`Runtime.Backend.ApiWebhookOperation.DefaultRetryMaximumInterval`	`01:00:00` (1 day)	Sets the maximum retry interval for managed API connector webhook triggers and actions.
`Runtime.Backend.ApiConnectionOperation.DefaultRetryMinimumInterval`	`00:00:05` (5 sec)	Sets the minimum retry interval for managed API connector triggers and actions.
`Runtime.Backend.ApiWebhookOperation.DefaultWakeUpInterval`	`01:00:00` (1 day)	Sets the default wake-up interval for managed API connector webhook trigger and action jobs.

Retry policy for all other operations

Setting	Default value	Description
`Runtime.ScaleMonitor.MaxPollingLatency`	`00:00:30` (30 sec)	Sets the maximum polling latency for runtime scaling.
`Runtime.Backend.Operation.MaximumRetryCount`	`90` retries	Sets the maximum number of retries in the retry policy definition for a workflow operation.
`Runtime.Backend.Operation.MaximumRetryInterval`	`01:00:00:01` (1 day and 1 sec)	Sets the maximum interval in the retry policy definition for a workflow operation.
`Runtime.Backend.Operation.MinimumRetryInterval`	`00:00:05` (5 sec)	Sets the minimum interval in the retry policy definition for a workflow operation.

Limitations

Maximum content size

By default, built-in triggers, such as HTTP or Request, are limited to the message size described in Limits and configuration reference - Messages. To handle files larger than the limit, try uploading your content as a blob to Azure Blob Storage, and then get your content using the Azure Blob connector.

Manage host settings - host.json

You can add, update, or delete host settings, which specify the runtime configuration settings and values that apply to all the workflows in that logic app, such as default values for throughput, capacity, data size, and so on, whether they run locally or in Azure. For host settings specific to logic apps, review the reference guide for available runtime and deployment settings - host.json.

Azure portal - host.json

To review the host settings for your single-tenant based logic app in the Azure portal, follow these steps:

In the Azure portal search box, find and open your logic app.
On the resource menu, under Development Tools, select Advanced Tools.
On the Advanced Tools pane, select Go, which opens the Kudu environment for your logic app.
On the Kudu toolbar, open the Debug console menu, and select CMD.

A console window opens so that you can browse to the wwwroot folder using the command prompt. Or, you can browse the directory structure that appears above the console window.
Browse along the following path to the wwwroot folder: ...\home\site\wwwroot.
Above the console window, in the directory table, next to the host.json file, select Edit.
After the host.json file opens, review any host settings that were previously added for your logic app.

For more information about host settings, review the reference guide for available host settings - host.json.

To add a setting, follow these steps:

Before you add or edit settings, stop your logic app in the Azure portal.
1. On the resource menu, select Overview.
2. On the Overview pane's toolbar, select Stop.
If the host.json file is already open, return to the host.json file. Otherwise, follow the preceding steps to open the host.json file.

Under the extensionBundle object, add the extensions object, which includes the workflow and settings objects, for example:

{
   "version": "2.0",
   "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[1.*, 2.0.0)"
   },
   "extensions": {
      "workflow": {
         "settings": {
         }
      }
   }
}

In the settings object, add a flat list with the host settings that you want to use for all the workflows in your logic app, whether those workflows run locally or in Azure, for example:

{
   "version": "2.0",
   "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[1.*, 2.0.0)"
   },
   "extensions": {
      "workflow": {
         "settings": {
            "Runtime.Trigger.MaximumWaitingRuns": "100"
         }
      }
   }
}

When you're done, remember to select Save.
Now, restart your logic app. Return to your logic app's Overview page, and select Restart.

Visual Studio Code - host.json

To review the host settings for your logic app in Visual Studio Code, follow these steps:

In your logic app project, at the root project level, find and open the host.json file.
In the extensions object, under workflows and settings, review any host settings that were previously added for your logic app. Otherwise, the extensions object won't appear in the file.

For more information about host settings, review the reference guide for available host settings - host.json.

To add a host setting, follow these steps:

In the host.json file, under the extensionBundle object, add the extensions object, which includes the workflow and settings objects, for example:

{
   "version": "2.0",
   "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[1.*, 2.0.0)"
   },
   "extensions": {
      "workflow": {
         "settings": {
         }
      }
   }
}

In the settings object, add a flat list with the host settings that you want to use for all the workflows in your logic app, whether those workflows run locally or in Azure, for example:

{
   "version": "2.0",
   "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[1.*, 2.0.0)"
   },
   "extensions": {
      "workflow": {
         "settings": {
            "Runtime.Trigger.MaximumWaitingRuns": "100"
         }
      }
   }
}

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Edit host and app settings for Standard logic apps in single-tenant Azure Logic Apps

App settings, parameters, and deployment

Visual Studio Code project structure

Reference for app settings - local.settings.json

Manage app settings - local.settings.json

View app settings in the portal

Add an app setting in the portal

View app settings in Visual Studio Code

Add an app setting in Visual Studio Code

Reference for host settings - host.json

Job orchestration throughput

Recurrence-based triggers

Trigger concurrency

Run duration and history retention

Run actions

Inputs and outputs

Chunking

Store content inline or use blobs

For each loops

Until loops

Variables

Built-in HTTP operations

Built-in HTTP Webhook operations

Built-in Azure Storage operations

Blob storage

Table and queue storage

Built-in Azure Functions operations

Built-in Azure Service Bus operations

Built-in SFTP operations

Managed connector operations

Retry policy for all other operations

Limitations

Manage host settings - host.json

Azure portal - host.json

Visual Studio Code - host.json

Next steps

Feedback

Additional resources

Share via

Edit host and app settings for Standard logic apps in single-tenant Azure Logic Apps

App settings, parameters, and deployment

Visual Studio Code project structure

Reference for app settings - local.settings.json

Manage app settings - local.settings.json

View app settings in the portal

Add an app setting in the portal

Reference for host settings - host.json

Job orchestration throughput

Recurrence-based triggers

Trigger concurrency

Run duration and history retention

Run actions

Inputs and outputs

Pagination

Chunking

Store content inline or use blobs

For each loops

Until loops

Variables

Built-in HTTP operations

Built-in HTTP Webhook operations

Built-in Azure Storage operations

Blob storage

Table and queue storage

File share

Built-in Azure Functions operations

Built-in Azure Service Bus operations

Built-in SFTP operations

Managed connector operations

Retry policy for all other operations

Limitations

Manage host settings - host.json

Azure portal - host.json

Visual Studio Code - host.json

Next steps

Feedback

Additional resources