cloudwatch bill with lambda is high. Any insights into why this is the case and how to control costs?

Question

A customer is concerned about their CloudWatch bill. 
They are using lambda, and logging to CloudWatch.
Reviewing their costs, it seems like the following metric is causing the high bill: 
"GetMetricData" 
Both "CW:GMD-Metrics ($)" and "CW:MetricMonitorUsage"

Has anyone else seen high bills rates with these metrics and lambda?
Any insights are appreciated.

Accepted Answer

If you need a indepth analysis of what is happening we need to do a    API Caller Analysis for GetMetricData. One thing to keep in mind is that GetMetricData is billed by number of metrics requested and not by API calls. 
1 ) You need to identify the resources 
2)  look at what calls are being made 
3) then Metrics vs requested per call

Does the customer using any monitoring service (Say - Data  Dog) .

I would suggest to open a support case . So that engineer will be able to  go deep dive to the API calls and will give you the exact metrics

cloudwatch bill with lambda is high. Any insights into why this is the case and how to control costs?

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