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Add exemplar support for const histogram #986

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merged 7 commits into from
Mar 17, 2022
+251 −10
Merged

Add exemplar support for const histogram #986

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d7f6f6f
Add support for exemplars on constHistogram
arun-shopify Jan 21, 2022
3d744ce
remove GetExemplars function
wperron Feb 15, 2022
ad6f1f6
fixed linting warnings
wperron Feb 15, 2022
47d3c54
Add values to correct bucket
wperron Mar 7, 2022
16ac129
Misc fixes
wperron Mar 11, 2022
daaf45b
avoid panic when there are fewer buckets than exemplars
arun-shopify Mar 9, 2022
3c2e890
Added MustNewMetricWithExemplars that wraps metrics with exemplar (#3)
bwplotka Mar 16, 2022
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Misc fixes 
Co-authored-by: Francis Bogsanyi <[email protected]>

Signed-off-by: William Perron <[email protected]>
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@wperron
wperron committed Mar 11, 2022
commit 16ac1292c7437c2fbb62f48380e11f65578eb2c6
4 changes: 2 additions & 2 deletions prometheus/histogram.go
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Original file line number Diff line number Diff line change
Expand Up @@ -584,7 +584,7 @@ func (h *constHistogram) Write(out *dto.Metric) error {
his := &dto.Histogram{}
// h.buckets, buckets and bounds are all the same length
buckets := make([]*dto.Bucket, 0, len(h.buckets))
bounds := make([]float64, 0)
bounds := make([]float64, 0, len(h.buckets))

his.SampleCount = proto.Uint64(h.count)
his.SampleSum = proto.Float64(h.sum)
Expand All @@ -599,8 +599,8 @@ func (h *constHistogram) Write(out *dto.Metric) error {
// make sure that both bounds and buckets have the same ordering
if len(buckets) > 0 {
sort.Sort(buckSort(buckets))
sort.Float64s(bounds)
}
sort.Float64s(bounds)

if len(h.exemplars) > 0 {
r := len(buckets)
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