Ravi Sir's Cards › AWS
Right-size before RIs
This revision card explains Right-size before RIs. It starts from the need that buying Reserved Instances for oversized servers locks in waste for a year. It describes first stop idle resources and downsize. Then consider Savings Plans/RIs for steady baseline only. The how-to section covers how to use Compute Optimizer / CW metrics; resize or schedule off-hours stop for non-prod. An example on the card is a t3.large at 5% CPU becomes t3.small; only then buy a Savings Plan for the steady web tier.
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What this card says
Why do we need it?
Buying Reserved Instances for oversized servers locks in waste for a year.
What is it?
First stop idle resources and downsize. Then consider Savings Plans/RIs for steady baseline only.
right-size first
How to do it
Use Compute Optimizer / CW metrics; resize or schedule off-hours stop for non-prod.
Example
A t3.large at 5% CPU becomes t3.small; only then buy a Savings Plan for the steady web tier.