This alert is triggered when the memory working set for an Azure Function App exceeds a predefined threshold. The memory working set represents the amount of memory actively used by the function app, and anomalies in this metric may indicate potential issues such as memory leaks or suboptimal memory usage. Customization Guidance: Threshold: Set a specific threshold for memory working set usage, based on historical data and the expected behavior of your function apps. For instance, if the typical memory usage is stable, a significant increase might be indicative of an issue. Function App Specificity: Customize alerts based on the specific function app and its role within your system. Critical function apps may require more sensitive thresholds. Response Plan: Ensure you have a plan for investigating and addressing memory-related issues, such as optimizing code, increasing memory limits, or scaling the app. Action: Upon triggering this alert, immediate actions include reviewing the function app's recent deployments and monitoring logs for any unusual activity. Analyze the memory usage patterns and consider optimizing the function app's performance.

This alert is triggered when the number of server error responses (HTTP status codes 5xx) for an Azure Function App exceeds a predefined threshold. A high rate of server errors can indicate issues such as backend failures, misconfigurations, or resource constraints. Customization Guidance: Threshold: Determine the appropriate threshold for server errors based on your application's tolerance for failures and historical performance data. A lower threshold might be necessary for critical function apps. Function App Specificity: Tailor alerts for different function apps, taking into account their specific functionalities and the criticality of their operations. Mitigation Strategies: Prepare strategies to mitigate server errors, such as automatic retries, load balancing, or failover mechanisms. Action: Upon triggering this alert, investigate the cause of the server errors by reviewing recent logs, checking backend services, and ensuring the function app is correctly configured. Consider implementing error-handling strategies or scaling resources if necessary.

This alert is triggered when the number of client error responses (HTTP status codes 4xx) for an Azure Function App exceeds a predefined threshold. An increase in client errors may indicate issues such as client misconfigurations, invalid requests, or security concerns. Customization Guidance: Threshold: Set a threshold for client errors based on your application's normal operation patterns. A sudden spike in 4xx errors might require immediate attention. Function App Specificity: Different function apps may require different thresholds, depending on their expected usage patterns and the nature of the client interactions. Monitoring and Response: Implement monitoring to identify the root causes of client errors, such as incorrect client requests, authentication issues, or security threats. Action: When this alert is triggered, review the logs and analyze the client requests causing the errors. Determine if the issues stem from misconfigurations, malicious activity, or other factors. Provide guidance to clients or make necessary adjustments to the function app.

This alert is triggered when the file system usage for an Azure Function App exceeds 90%. High file system usage can lead to performance degradation and potential failures, especially if the app reaches the maximum storage capacity. Customization Guidance: Threshold: The default threshold is set at 90%. Depending on the function app's specific needs and available storage, this threshold may need adjustment. Function App Specificity: Different function apps may require different thresholds based on their storage requirements and expected data growth. Preventive Measures: Regularly monitor and manage storage usage. Implement strategies such as data archiving, increasing storage capacity, or optimizing storage usage. Action: Upon triggering this alert, review the storage usage patterns and determine if there are any unnecessary files or data that can be removed. Consider scaling the storage or optimizing data storage practices to prevent reaching full capacity.

This alert is triggered when the file system usage for an Azure Function App exceeds 80%. High file system usage can lead to performance degradation and potential failures, especially if the app reaches the maximum storage capacity. Customization Guidance: Threshold: The default threshold is set at 80%. Depending on the function app's specific needs and available storage, this threshold may need adjustment. Function App Specificity: Different function apps may require different thresholds based on their storage requirements and expected data growth. Preventive Measures: Regularly monitor and manage storage usage. Implement strategies such as data archiving, increasing storage capacity, or optimizing storage usage. Action: Upon triggering this alert, review the storage usage patterns and determine if there are any unnecessary files or data that can be removed. Consider scaling the storage or optimizing data storage practices to prevent reaching full capacity.