現在可以透過 AWS Budgets 來看到 Reserved Instance 的使用率了：「Monitor your Reserved Instance utilization by receiving alerts via AWS Budgets」。
Starting today, customers can now monitor and receive alerts when their Reserved Instance (“RI”) utilization falls below the threshold they define.
算是個開頭，不過我更想請 AWS 分析有哪些機器是長年開著沒有 discount 的... 或者像是 GCP 那樣自動算 :o