Why did I loose my usage stats?

CloudWatch metrics are a best efforts service so there will be gaps in your monitoring on occasion. It doesn’t happen very often but there isn’t anything you can do to get the missing datapoints back.

Hello,

Reading through the case notes, I understand that used CloudWatch to monitor the stats of a s simple EC2 instance and an RDS instance, however after a while you only had stats for CPUUtilization but CPUCreditBalance and CPUCreditUsage are still missing from the graph. Correct me if misunderstood you.

looking at AWS re:Post [1] this is a known issue regarding the t3 instance families, can you confirm if you are using the t3 instance family?

From my end I would like to point out that CloudWatch works as push service, and not a poll service. What this means is that in most scenarios, such as metrics delivery, CloudWatch only acts as a storage facility for metrics and is highly dependent of other services to send metrics to CloudWatch Logs [2].

With that being said you might need to reach put to AWS Premium Support regarding this as it is an issue that can be solved by Technical Support.

I hope you find the above information helpful.

Have a great day ahead!

References

[1]AWS re-Post-https://repost.aws/questions/QURRD6D64tQ1S_fGWfvbZndA/cpu-credit-usage-and-cpu-credit-balance-metrics-missing-in-t-3-a

[2] How Amazon CloudWatch works - https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_architecture.htm