Which of the following is a custom metric in CloudWatch which you have to manually set up?

The company that you are working for has a highly available architecture consisting of an elastic load balancer and several EC2 instances configured with auto-scaling in three Availability Zones. You want to monitor your EC2 instances based on a particular metric, which is not readily available in CloudWatch .

Which of the following is a custom metric in CloudWatch which you have to manually set up?
A . Disk Reads activity of an EC2 instance
B . Memory Utilization of an EC2 instance
C . Network packets out of an EC2 instance
D . CPU Utilization of an EC2 instance

View Answer

Answer: B

Explanation:

CloudWatch has available Amazon EC2 Metrics for you to use for monitoring. CPU Utilization identifies the processing power required to run an application upon a selected instance. Network Utilization identifies the volume of incoming and outgoing network traffic to a single instance. Disk Reads metric is used to determine the volume of the data the application reads from the hard disk of the instance. This can be used to determine the speed of the application. However, there are certain metrics that are not readily available in CloudWatch such as memory utilization, disk space utilization, and many others which can be collected by setting up a custom metric.

You need to prepare a custom metric using CloudWatch Monitoring Scripts which is written in Perl. You can also install CloudWatch Agent to collect more system-level metrics from Amazon EC2 instances. Here’s the list of custom metrics that you can set up:

– Memory utilization

– Disk swap utilization

– Disk space utilization

– Page file utilization

– Log collection

CPU Utilization of an EC2 instance, Disk Reads activity of an EC2 instance, and Network packets out of

an EC2 instance are all incorrect because these metrics are readily available in CloudWatch by default.

References:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring_ec2.html

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/mon-scripts.html#using_put_script

Check out this Amazon EC2 Cheat Sheet: https://tutorialsdojo.com/amazon-elastic-compute-cloud-amazon-ec2/ Check out this Amazon CloudWatch Cheat Sheet: https://tutorialsdojo.com/amazon-cloudwatch/