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lib/storage: do not increment vm_slow_metric_name_loads_total counter for metric_ids which shouldnt be prefetched, since this may mislead users

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This commit is contained in:
Aliaksandr Valialkin 2020-05-16 10:21:17 +03:00
parent dc16cdd1ca
commit 2a8f1e6931
1 changed files with 1 additions and 1 deletions
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2
lib/storage/storage.go
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@ -877,11 +877,11 @@ func (s *Storage) prefetchMetricNames(tsids []TSID) error {
metricIDs = append(metricIDs, metricID)
tsidsMap[metricID] = &tsids[i]
}
atomic.AddUint64(&s.slowMetricNameLoads, uint64(len(metricIDs)))
if len(metricIDs) < 500 {
// It is cheaper to skip pre-fetching and obtain metricNames inline.
return nil
}
atomic.AddUint64(&s.slowMetricNameLoads, uint64(len(metricIDs)))
// Pre-fetch metricIDs.
sort.Sort(metricIDs)