From 414442322734030bcf39f923fe3ce8259a6ab9ab Mon Sep 17 00:00:00 2001
From: Jon Chambers <jon@signal.org>
Date: Mon, 3 Aug 2020 17:51:27 -0400
Subject: [PATCH] Publish percentiles for Micrometer distributions/timers.

---
 .../textsecuregcm/WhisperServerService.java              | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java b/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
index 1a924a2f7..3d3067ddc 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
@@ -49,6 +49,7 @@ import io.micrometer.core.instrument.ImmutableTag;
 import io.micrometer.core.instrument.Meter;
 import io.micrometer.core.instrument.Metrics;
 import io.micrometer.core.instrument.Tag;
+import io.micrometer.core.instrument.distribution.DistributionStatisticConfig;
 import io.micrometer.datadog.DatadogConfig;
 import io.micrometer.datadog.DatadogMeterRegistry;
 import io.micrometer.wavefront.WavefrontConfig;
@@ -284,6 +285,14 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
           tags.add(new ImmutableTag("environment", micrometerDatadogConfig.getEnvironment()));
           return tags;
         }
+
+        @Override
+        protected DistributionStatisticConfig defaultHistogramConfig() {
+          return DistributionStatisticConfig.builder()
+                  .percentiles(.75, .95, .99, .999)
+                  .build()
+                  .merge(super.defaultHistogramConfig());
+        }
       });
     }