PERF 15. How do you monitor your proximity and caching solutions to ensure performance is as expected?
System performance can degrade over time due to internal or external factors. Monitoring the performance of systems allows you to identify this degradation and remediate the internal or external factors.
Best practices:
 Amazon CloudWatch monitoring Use CloudWatch to monitor instances.
 Third-party monitoring Use third-party tools to monitor systems.
 Periodic review Periodically review your monitoring dashboards.

 Alarm-based notifications Plan for your monitoring systems to automatically alert you if metrics are out of safe bounds.
 Trigger-based actions Plan for alarms to cause automated actions to remediate or escalate issues.