[Prometheus] Align on the algorithm used to transform Prometheus hist…

…ograms into Elasticsearch histograms (#36647) * Align on the algorithm used to transform Prometheus histograms into Elasticsearch histograms: Use the preceding bucket's value for +Inf 'le', for the first bucket only: if it has a negative 'le', use the value as-is; add test for the negative buckets; extend explanation on the counts calculation Signed-off-by: Tetiana Kravchenko <tetiana.kravchenko@elastic.co> * fix prometheus remote_write tests; regenerate istio expected documents; revert unrelated changes Signed-off-by: Tetiana Kravchenko <tetiana.kravchenko@elastic.co> * add link to the design/motivation of the histogram transformation logic Signed-off-by: Tetiana Kravchenko <tetiana.kravchenko@elastic.co> --------- Signed-off-by: Tetiana Kravchenko <tetiana.kravchenko@elastic.co>
elastic · Oct 11, 2023 · 73303ae · 73303ae
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diff --git a/CHANGELOG.next.asciidoc b/CHANGELOG.next.asciidoc
@@ -251,6 +251,7 @@ is collected by it.
 - Add GCP CloudSQL metadata {pull}33066[33066]
 - Add GCP Carbon Footprint metricbeat data {pull}34820[34820]
 - Add event loop utilization metric to Kibana module {pull}35020[35020]
+- Align on the algorithm used to transform Prometheus histograms into Elasticsearch histograms {pull}36647[36647]
 
 
 *Osquerybeat*