Multiple innovacation logs in function App

Question

Multiple innovacation logs in function App . Below is the host.json file

{

"version": "2.0",

"logging": {

"applicationInsights": {

  "samplingSettings": {

    "isEnabled": true,

    "excludedTypes": "Request"

  }

},

"logLevel": {

  "default": "Information",

  "Host.Aggregator": "Trace",

  "Host.Results": "Error",

  "Function": "Information"

}

},

"extensions": {

"queues": {

  "messageEncoding": "none"

}

}

}

Answer 1

Hi Jomon,

It looks like you're dealing with multiple invocation logs in your Azure Function App. Your host.json configuration seems mostly fine

Adjust Log Levels, u can fine-tune the log levels to reduce noise. For example, setting Function Warning instead of Information might help.

Sampling Settings u Application Insights sampling is enabled, which is good for reducing volume. Ensure it's configured to sample the right types of telemetry. Custom Logging implement custom logging within your functions to log only what's necessary. Review Host Settings, ensure that Host.Aggregator and Host.Results are set appropriately for your needs.

If the logs are still overwhelming, consider filtering them in Application Insights or using query-based logging to focus on specific events.

Hope this helps!

rgds,

Alex

Answer 2

Hello Jomon John,

Thanks for using Q & A forum.

Solution:

You are seeing multiple invocation logs because the default log level is set to Information which basically logs the complete general flow of the application.

• To reduce the invocation logs, you need to fine-tune the loglevels in host.json.
• For example, you can set default to Warning if you want to prevent excessive logging of the function.
• Set Host.Aggregator and Host.Results to lower logging levels to avoid the loss of metrics and performance related data.

I have modified your host.json as below and able to avoid excessive invocation logs, refer MSDOC to configure log levels for Azure functions.

host.json:

{

  "version": "2.0",

  "logging": {

    "applicationInsights": {

      "samplingSettings": {

        "isEnabled": true,

        "excludedTypes": "Request"

      },

      "logLevel": {

        "default": "Warning",

        "Host.Aggregator": "Trace",

        "Host.Results": "Information",

        "Function": "Information"

      }

    }

  },

  "extensions": {

    "queues": {

      "messageEncoding": "none"

    }

  }

}

Console output:

Hope this helps.

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