[Prometheus の rate() 関数を理解する - Qiita](https://qiita.com/MetricFire/items/356054a458f4ef88d86c) ### Code - [prometheus/functions.go at fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7 · prometheus/prometheus · GitHub](https://github.com/prometheus/prometheus/blob/fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7/promql/functions.go#L220) - [prometheus/functions.go at fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7 · prometheus/prometheus · GitHub](https://github.com/prometheus/prometheus/blob/fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7/promql/functions.go#L66) - [prometheus/float_histogram.go at fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7 · prometheus/prometheus · GitHub](https://github.com/prometheus/prometheus/blob/fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7/model/histogram/float_histogram.go#L407) - [prometheus/float_histogram.go at fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7 · prometheus/prometheus · GitHub](https://github.com/prometheus/prometheus/blob/fa6e05903fd3ce52e374a6e1bf4eb98c9f1f45a7/model/histogram/float_histogram.go#L437)