The Development Team has developed a new application for its premiere customers. This application will be deployed on Amazon EC2 instances. Before launching, the team needs to perform testing to check parameters like average time to load web pages and the number of processes initiated on the instance. The Development Team wants to capture the most granular details for these parameters.
Which metric settings can be done to get required metrics in Amazon CloudWatch?

Answer options:

A.Create Custom metrics with PutCustomMetric API having StorageResolution parameter set as 1.
B.Create Custom metrics with PutCustomMetric API having StorageResolution parameter set as default.
C.Create Custom metrics with PutMetricData API having StorageResolution parameter set as 1.
D.Create Custom metrics with PutMetricData API having StorageResolution parameter set as default.

Correct Answer: C
Amazon CloudWatch can be used to monitor data from applications using Custom Metrics. Custom Metrics can be used to capture application-related metrics like time to load a web page, error rates, a number of processes on the instance and publish to Amazon CloudWatch.
Custom Metrics can be published to Amazon CloudWatch using PutMetricData API. To get metrics with high-resolution, StorageResolution parameters need to be set as 1. This publishes Metric with a high resolution of 1 second. Setting StorageResolution parameter as default, metric will be published with a standard resolution of 1 minute.
Options A & B are incorrect as PutCustomMetric API is an invalid API.
Option D is incorrect as the StorageResolution parameter set as default will create a resolution as 1 minute. In this case, the customer is looking for more granular detail.
For more information on using custom metrics, refer to the following URL,
https://aws.amazon.com/cloudwatch/faqs/