dao-jun commented on code in PR #19716:
URL: https://github.com/apache/pulsar/pull/19716#discussion_r1133763465


##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/util/StatsBuckets.java:
##########
@@ -73,6 +73,19 @@ public void refresh() {
         this.count = count;
     }
 
+    public void collect() {
+        long count = 0;
+        sum = sumCounter.sum();
+
+        for (int i = 0; i < buckets.length; i++) {
+            long value = buckets[i].sum();
+            count += value;
+            values[i] = value;
+        }
+
+        this.count = count;

Review Comment:
   There seems to be a problem. For Histogram, `count` is the times of 
add/observe method invoked



##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentSubscription.java:
##########
@@ -1117,6 +1117,11 @@ public SubscriptionStatsImpl getStats(Boolean 
getPreciseBacklog, boolean subscri
         if (dispatcher instanceof PersistentDispatcherMultipleConsumers) {
             subStats.delayedMessageIndexSizeInBytes =
                     ((PersistentDispatcherMultipleConsumers) 
dispatcher).getDelayedTrackerMemoryUsage();
+
+            subStats.bucketDelayedIndexStats =
+                    ((PersistentDispatcherMultipleConsumers) 
dispatcher).getBucketDelayedIndexStats();
+
+            System.out.println();

Review Comment:
   Should be removed?



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