[jakozaur]

My experience from Sumo Logic is to take full advantage of RIs you need to do capacity planning and that takes some effort. Still that's way over 30% of savings which are needed if you run at scale.

Would recommend using CloudHealth or other tool vs. using custom ETL. I tried do it myself on my tools, but got worse results than using dedicated tool.

However, dedicated tool need input from development. Sometimes it's worth to buy non-convertible RIs for bigger instance. Sometimes convertible RIs are easier. I just found that convertible RIs with some upfront are incredible tricky to calculate amortisation.