Azure Functions throwing 'Execution Timed Out' scenarios intermittently under heavy load
I'm getting frustrated with This might be a silly question, but I'm currently working with an scenario with my Azure Functions app where it throws an 'Execution Timed Out' behavior when under heavy load. The function is triggered by an Azure Queue Storage message, and it performs some data processing followed by writing to an Azure SQL Database. The timeout occurs intermittently, particularly during peak times when the queue has a large number of messages. I've tried increasing the timeout setting in the host.json file to 5 minutes, but I'm still working with the same scenario. Here’s a snippet of my host.json configuration: ```json { "functionTimeout": "00:05:00", "logging": { "logLevel": { "default": "Information" } } } ``` Additionally, I’m using the following code snippet to process the queue message: ```csharp public static async Task Run([QueueTrigger("myqueue-items")] string queueItem, ILogger log) { log.LogInformation($"Processing message: {queueItem}"); // Simulate processing logic await Task.Delay(TimeSpan.FromSeconds(30)); // Simulated processing time // Write to SQL Database await WriteToDatabase(queueItem); } ``` During peak load, I receive the following behavior in the logs: `Function 'MyFunction' failed during execution: Execution timed out.` I’ve also considered scaling out the function app, but I'm unsure about the best practices for configuring the host plan for that. Could it be that the function app is not scaling fast enough? Any guidance on optimizing the performance of Azure Functions in this scenario would be greatly appreciated. Am I missing something obvious? What's the best practice here?