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Update comment for scheduler_behind_seconds metric (#45918)

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George Robinson 2022-02-25 14:43:08 +00:00 committed by GitHub
parent 525ecab3ee
commit f87bfdf2ff
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1 changed files with 3 additions and 3 deletions
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6
pkg/services/ngalert/schedule/schedule.go
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@ -369,9 +369,9 @@ func (sch *schedule) schedulePeriodic(ctx context.Context) error {
select {
case tick := <-sch.ticker.C:
// We use Round(0) on the start time to remove the monotonic clock.
// This is required as late ticks from the ticker have current monotonic
// timestamps such that start.Sub(tick) does not return the expected
// delta.
// This is required as ticks from the ticker and time.Now() can have
// a monotonic clock that when subtracted do not represent the delta
// in wall clock time.
start := time.Now().Round(0)
sch.metrics.BehindSeconds.Set(start.Sub(tick).Seconds())