Thursday 11 July 2024

Monitor AEM page performance using DataDog

Measuring page performance using Datadog involves setting up appropriate monitoring and visualization of performance metrics. 



Here’s a step-by-step guide to achieve this:


 1.  Setup Datadog 

-  Sign Up : If you haven’t already, sign up for a Datadog account.

-  Install the Agent : Install the Datadog agent on your servers. Follow the instructions specific to your operating system from the Datadog documentation.


 2.  Instrument Your Application 

-  APM (Application Performance Monitoring) : Enable APM in your application to trace requests and monitor performance.

  -  Java : Use the `dd-java-agent.jar`.

  -  Node.js : Install the Datadog APM module.

  -  Python : Use the `ddtrace` library.

  -  Other Languages : Datadog provides agents for various languages like Ruby, .NET, Go, and PHP.

-  Browser RUM (Real User Monitoring) : Install the Datadog RUM library in your frontend application to monitor end-user experience.


 3.  Configure APM and RUM 

-  APM Configuration : Add APM configurations to your application to start collecting performance data. Ensure you are capturing essential metrics such as request duration, error rates, and resource usage.

-  RUM Configuration : Add the RUM snippet to your HTML pages to start tracking user interactions and page load times.


 4.  Set Up Dashboards 

-  Create Dashboards : Create custom dashboards in Datadog to visualize performance metrics.

  -  APM Dashboard : Include widgets for request duration, throughput, error rates, and individual request traces.

  -  RUM Dashboard : Add widgets for page load times, user interactions, core web vitals (LCP, FID, CLS), and session metrics.


 5.  Define Monitors and Alerts 

-  Set Up Monitors : Create monitors to alert you when performance metrics exceed acceptable thresholds.

  -  Page Load Time : Monitor the average and 95th percentile page load times.

  -  Error Rates : Monitor the error rates for API calls and page resources.

  -  Core Web Vitals : Monitor LCP, FID, and CLS values.

-  Alerts : Configure alerts to notify your team via email, Slack, or other communication channels when performance issues arise.


 6.  Use Datadog Synthetic Monitoring 

-  Synthetic Tests : Set up synthetic tests to simulate user interactions with your application and measure performance from various locations.

  -  Browser Tests : Simulate real user journeys and measure performance.

  -  API Tests : Monitor the performance of your APIs.


 7.  Analyze and Optimize 

-  Trace Analysis : Use the APM trace view to analyze individual requests and identify bottlenecks.

-  RUM Insights : Analyze RUM data to understand user behavior and identify performance issues affecting the end-user experience.

-  Synthetic Results : Review synthetic test results to detect performance issues and geographic variations.


 8.  Continuous Monitoring and Improvement 

-  Regular Reviews : Regularly review performance data and adjust thresholds and monitors as necessary.

-  Performance Tuning : Use insights from Datadog to optimize code, improve server configurations, and enhance frontend performance.

-  Collaborate with Teams : Share insights with development, DevOps, and QA teams to ensure continuous performance improvements.


 Example: Setting Up Datadog RUM


1.  Install the RUM Browser SDK :

 

   <script src="https://www.datadoghq-browser-agent.com/datadog-rum-v4.js" type="text/javascript"></script>

   <script>

     window.DD_RUM && window.DD_RUM.init({

       clientToken: 'YOUR_CLIENT_TOKEN',

       applicationId: 'YOUR_APPLICATION_ID',

       site: 'datadoghq.com',

       service: 'your-service-name',

       env: 'production',

       version: '1.0.0',

       sampleRate: 100,

       trackInteractions: true,

     });

     window.DD_RUM.startSessionReplayRecording();

   </script>



2.  Configure APM in Your Application :


   // For Java

   java -javaagent:/path/to/dd-java-agent.jar -Ddd.service=my-service -Ddd.env=production -Ddd.version=1.0.0 -Ddd.logs.injection=true -jar your-application.jar



 Conclusion


By integrating Datadog’s APM, RUM, and Synthetic Monitoring, you can gain comprehensive insights into your AEM page performance, allowing you to identify and resolve performance issues effectively.

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