[FEATURE] Add CW API request metrics that match API billing about yet-another-cloudwatch-exporter HOT 2 CLOSED

The GetMetricData issue has been reported (and implemented by linked PRs) in #339
I think with that implementation though it would be nice to see which namespaces are requesting the most data as a label on the metric to make debugging easier.

The ListMetrics one I can make a PR for.

from yet-another-cloudwatch-exporter.

👋 thanks for adding these metrics I think it will be helpful! I was just wondering if you have a source for this line,

CW GetMetricData -> for # of metrics retrieved

because the CloudWatch pricing docs seem to indicate it's related to requested data and I'm not able to find anything that says it's about returned data, https://aws.amazon.com/cloudwatch/pricing/?nc1=h_ls.

GetMetricData, GetInsightRuleReport $0.01 per 1,000 metrics requested

If there is somewhere in AWS's docs which says "requested" = "returned" I think it would be awesome to have that linked to prevent confusion. Otherwise, the logic in the linked PR might need adjust to increment based on the number of queries vs the number of result for accuracy purposes.

Edit: Got a bit lost in the different issues, #339, indicates the counter should be based on requested, but the implementation which was merged, #939 is based on returned data. I think a PR is needed here to fix the slight disconnect.

from yet-another-cloudwatch-exporter.