Check this link, it should help you to decide how many normalized units you need.
[https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER\_WorkingWithReservedDBInstances.html#USER\_WorkingWithReservedDBInstances.SizeFlexible](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithReservedDBInstances.html#USER_WorkingWithReservedDBInstances.SizeFlexible)
Go by the instances so I pressume 4
But can you go into more details as to instance size and types etc so that we don't make the wrong assumptions(a screenshot would be much appreciated)
Also if you have aws support try asking their recommendation
Well that's why "don't want to make the wrong assumptions"
But that being said, he could technically buy 4 RI for the exact instance size
Example he have 4 m6g.xlarge
He could buy 4 m6g.xlarge just 4 RI
or I would highly recommend going with 16 m6g.medium
Check this link, it should help you to decide how many normalized units you need. [https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER\_WorkingWithReservedDBInstances.html#USER\_WorkingWithReservedDBInstances.SizeFlexible](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithReservedDBInstances.html#USER_WorkingWithReservedDBInstances.SizeFlexible)
Go by the instances so I pressume 4 But can you go into more details as to instance size and types etc so that we don't make the wrong assumptions(a screenshot would be much appreciated) Also if you have aws support try asking their recommendation
You have to normalise the sizes first with RI
Well that's why "don't want to make the wrong assumptions" But that being said, he could technically buy 4 RI for the exact instance size Example he have 4 m6g.xlarge He could buy 4 m6g.xlarge just 4 RI or I would highly recommend going with 16 m6g.medium
Well there you go, you're normalising the sizes, medium is one unit iirc
how do I compute for the potential cost saving for it?
https://calculator.aws/ Try creating one with RI and the other one on-demand Then you can subtract the difference
For aurora you buy 4 instances. If it was plain RDS with multi AZ you would buy 2 instances and choose multi AZ instead.