New Check: Underutilized Amazon Redshift Clusters

[brittandeyoung]

Summary

Checks your Amazon Redshift configuration for clusters that appear to be underutilized.

Motivation

If an Amazon Redshift cluster has not had a connection for a prolonged period of time, or is using a low amount of CPU, you can use lower-cost options such as downsizing the cluster, or shutting down the cluster and taking a final snapshot. Final snapshots are retained even after you delete your cluster.

Additional context

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#underutilized-amazon-redshift-clusters