add exemplar to native histogram (#80)

Add exemplars to native histogram Signed-off-by: Ziqi Zhao <zhaoziqi9146@gmail.com>
prometheus · Jan 23, 2024 · d56cd79 · d56cd79
1 parent f22bbab
commit d56cd79
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diff --git a/go/metrics.pb.go b/go/metrics.pb.go
diff --git a/io/prometheus/client/metrics.proto b/io/prometheus/client/metrics.proto
@@ -107,6 +107,9 @@ message Histogram {
   // histograms.
   repeated sint64 positive_delta    = 13; // Count delta of each bucket compared to previous one (or to zero for 1st bucket).
   repeated double positive_count    = 14; // Absolute count of each bucket.
+
+  // Only used for native histograms. These exemplars MUST have a timestamp.
+  repeated Exemplar exemplars = 16;
 }
 
 // A Bucket of a conventional histogram, each of which is treated as