Mistakenly Bought AWS RDS Reserved Instance

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I accidentally purchased an AWS RDS Reserved Instance without any upfront payment. I reached out to the AWS support team and requested to cancel it, as it was an honest mistake. However, I was informed that it would take 2-3 weeks to receive a decision.

I have a couple of questions. Firstly, if the decision is made to cancel the reserved instance, will I still be charged for the 2-3 week period? I'm not currently using the instance type nor do I have any instances set up. Is there any way to freeze the charges until a decision is made? Also, if I am charged, will I receive a refund for those weeks?

Secondly, I was told that the reserved instance discount would be applicable to existing on-demand instances. However, my current instance is db.m4.4xlarge and the reserved instance is db.m5.4xlarge. Is there any possibility of obtaining the discount as mentioned?

2 Answers
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To obtain the discount you'd have to switch your RDS instance from m4 to m5 (a good idea anyway, newer faster better cheaper), as it only applies to matching instance types.

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answered a year ago
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Firstly, if the decision is made to cancel the reserved instance, will I still be charged for the 2-3 week period? I'm not currently using the instance type nor do I have any instances set up. Is there any way to freeze the charges until a decision is made? Also, if I am charged, will I receive a refund for those weeks?

Ans : If your cancellation is approved, it will be as of the day the request was raised. Receiving refund for the charges already posted will depend on Billing Adjustment approval. Its not guaranteed. If you are cancelling RI within a month ( before a bill is generated), it is easier to handle

Secondly, I was told that the reserved instance discount would be applicable to existing on-demand instances. However, my current instance is db.m4.4xlarge and the reserved instance is db.m5.4xlarge. Is there any possibility of obtaining the discount as mentioned?

Ans : You can raise a request with concierge team to repurpose the RI for new instance type. This will help as they would know that you still plan to use RI but for different instance. Size flexibility is not available for licenses RDS ( Microsoft SQL and Oracle) Refer size flexibility section : https://aws.amazon.com/rds/reserved-instances/

AWS
answered a year ago

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