Understanding EC2 Under-provisioned

Question

Hi,

I have a t2.micro machine which is running a small application in it. When I saw the my machine is Under-provisioned then I look into details I found its EBS is under provisioned  "EBS read operations (per second), EBS write operations (per second) , EBS read bandwidth (MiB/second) & EBS write bandwidth (MiB/second)".

I have created my infrastructure using CF. I have update the code to change the my EC2 instance type to  t3.micro and volume type to GP3 volume. Now when I see the AWS Compute Optimizer it says "AWS Compute Optimizer finding
Auto scaling groups with mixed instance types are not supported yet". I wanted to know why its not showing the findings.

After updating Instance type t2 to t3 I have observed instance Memory Utilization is more than 80%. I have not seen this much memory utilization in t2 instance. Help me understand why t3 consumes more Memory

Sivaraman Selvam · Answer

Hello,

AWS Compute Optimizer has a limitation that it can't provide recommendations  when you use more than one instance type in ASG. To read more about getting recommendations for instances in ASG https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-getting-recommendations.html

> The Auto Scaling groups must also be configured to run a single instance type (i.e., no mixed instance types), must not have a scaling policy attached to them, and have the same values for desired, minimum, and maximum capacity (i.e., an Auto Scaling group with a fixed number of instances). Compute Optimizer generates recommendations for instances in Auto Scaling groups that meet all of these configuration requirements.

Regarding the high memory utilization in t3 micro instance it can be due to many factors you can use tools like htop, top, or free -m to get detailed information about memory usage. Identify which processes are consuming the most memory.

Understanding EC2 Under-provisioned

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