emitskevich-blp commented on code in PR #15889:
URL: https://github.com/apache/kafka/pull/15889#discussion_r1610656953
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clients/src/main/java/org/apache/kafka/common/metrics/stats/SampledStat.java:
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@@ -50,10 +50,13 @@ public void record(MetricConfig config, double value, long
timeMs) {
sample = advance(config, timeMs);
update(sample, config, value, timeMs);
sample.eventCount += 1;
+ sample.lastEventMs = timeMs;
}
private Sample advance(MetricConfig config, long timeMs) {
- this.current = (this.current + 1) % config.samples();
+ // need to keep one extra sample (see purgeObsoleteSamples() logic)
Review Comment:
I slightly changed the suggestion, please check if it's readable. Because
technically this extra space is not to remember the last recording time, it's
to keep the entire extra sample with all collected data.
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