From accb017ec5b88d614318ef4fa108b5e7924133ca Mon Sep 17 00:00:00 2001
From: Jon Chambers <jon@signal.org>
Date: Tue, 17 Jan 2023 12:40:20 -0500
Subject: [PATCH] Use a longer expiration window for quantile calculation

---
 .../textsecuregcm/storage/ReportMessageDynamoDb.java        | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/storage/ReportMessageDynamoDb.java b/service/src/main/java/org/whispersystems/textsecuregcm/storage/ReportMessageDynamoDb.java
index 611514d2c..49111f991 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/storage/ReportMessageDynamoDb.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/storage/ReportMessageDynamoDb.java
@@ -24,7 +24,11 @@ public class ReportMessageDynamoDb {
   private final Duration ttl;
 
   private static final String REMOVED_MESSAGE_COUNTER_NAME = name(ReportMessageDynamoDb.class, "removed");
-  private static final Timer REMOVED_MESSAGE_AGE_TIMER = Metrics.timer(name(ReportMessageDynamoDb.class, "removedMessageAge"));
+  private static final Timer REMOVED_MESSAGE_AGE_TIMER = Timer
+      .builder(name(ReportMessageDynamoDb.class, "removedMessageAge"))
+      .publishPercentiles(0.5, 0.75, 0.95, 0.99)
+      .distributionStatisticExpiry(Duration.ofDays(1))
+      .register(Metrics.globalRegistry);
 
   public ReportMessageDynamoDb(final DynamoDbClient dynamoDB, final String tableName, final Duration ttl) {
     this.db = dynamoDB;