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Document implications of negative observations 

Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
beorn7 2021-05-26 23:41:30 +02:00
parent a7515ca7c9
commit f34145a85e
2 changed files with 12 additions and 2 deletions
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7
prometheus/histogram.go
View File

@ -47,7 +47,12 @@ type Histogram interface {
Metric Metric
Collector Collector
// Observe adds a single observation to the histogram. // Observe adds a single observation to the histogram. Observations are
// usually positive or zero. Negative observations are accepted but
// prevent current versions of Prometheus from properly detecting
// counter resets in the sum of observations. See
// https://prometheus.io/docs/practices/histograms/#count-and-sum-of-observations
// for details.
Observe(float64) Observe(float64)
} }

7
prometheus/summary.go
View File

@ -55,7 +55,12 @@ type Summary interface {
Metric Metric
Collector Collector
// Observe adds a single observation to the summary. // Observe adds a single observation to the summary. Observations are
// usually positive or zero. Negative observations are accepted but
// prevent current versions of Prometheus from properly detecting
// counter resets in the sum of observations. See
// https://prometheus.io/docs/practices/histograms/#count-and-sum-of-observations
// for details.
Observe(float64) Observe(float64)
} }