jtuglu-netflix commented on code in PR #17847:
URL: https://github.com/apache/druid/pull/17847#discussion_r2094378018
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server/src/main/java/org/apache/druid/segment/realtime/SegmentGenerationMetrics.java:
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@@ -105,14 +164,23 @@ public void setSinkCount(long sinkCount)
this.sinkCount.set(sinkCount);
}
+ public void reportMessageGap(final long messageGap)
+ {
+ messageGapStats.add(messageGap);
+ }
+
public void reportMessageMaxTimestamp(long messageMaxTimestamp)
{
- this.messageMaxTimestamp.set(Math.max(messageMaxTimestamp,
this.messageMaxTimestamp.get()));
+ if (this.messageMaxTimestamp.get() < messageMaxTimestamp) {
+ this.messageMaxTimestamp.getAndAccumulate(messageMaxTimestamp,
Math::max);
+ }
}
public void reportMaxSegmentHandoffTime(long maxSegmentHandoffTime)
{
- this.maxSegmentHandoffTime.set(Math.max(maxSegmentHandoffTime,
this.maxSegmentHandoffTime.get()));
+ if (this.maxSegmentHandoffTime.get() < maxSegmentHandoffTime) {
+ this.maxSegmentHandoffTime.getAndAccumulate(maxSegmentHandoffTime,
Math::max);
Review Comment:
This is a faster pattern than doing a blind get/set. This value isn't
monotonically increasing, hence you avoid the cache exclusive MESI ownership
change.
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