Questions
4 of 8
1What is an Auto Scaling Group (ASG) and how does it work in EC2?
2Explain the difference between desired, minimum, and maximum capacity.
3What are the different ASG Scaling Policies?
4What are good metrics to scale on?
5What is Amazon CloudWatch and how is it used with EC2?
6Discuss Auto Scaling Group attributes
7How to create an Auto Scaling Group
8How to set up each scaling policy, and what are the parameters
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04 / 08

What are good metrics to scale on?

Critical Scaling Metrics

Selecting the right metric is vital for responsive scaling. Metrics are typically tracked via Amazon CloudWatch.

Recommended Metrics
  1. 1

    CPUUtilization: Measures the average CPU load; ideal for compute-intensive apps.

  2. 2

    RequestCountPerTarget: Measures the number of requests hitting the ELB; ideal for web traffic.

  3. 3

    Average Network In/Out: Useful if the application is network-bound.

  4. 4

    Memory Utilization: Requires a CloudWatch agent as it is not a default EC2 metric.