org.apache.flink.runtime.state.gemini.engine.metrics.SnapshotCompactionMetrics Maven / Gradle / Ivy
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package org.apache.flink.runtime.state.gemini.engine.metrics;
import org.apache.flink.metrics.MetricGroup;
import org.apache.flink.runtime.state.gemini.engine.snapshot.SnapshotCompactionStat;
/**
* Metrics for snapshot compaction.
*/
public class SnapshotCompactionMetrics extends MetricsBase {
/**
* Actual amplification ratio for the latest snapshot.
*/
private static final String AMPLIFICATION_RATIO = "ratio";
/**
* Number of snapshot compaction.
*/
private static final String COMPACTION_COUNT = "count";
/**
* Size of data to compaction.
*/
private static final String COMPACTION_SIZE = "size";
/**
* Duration of last snapshot compaction.
*/
private static final String COMPACTION_DURATION = "duration";
public SnapshotCompactionMetrics(
MetricGroup metricGroup,
int sampleCountInterval,
int histogramWindowSize) {
super(metricGroup, sampleCountInterval, histogramWindowSize);
}
public void register(SnapshotCompactionStat snapshotCompactionStat) {
getGaugeMetric(AMPLIFICATION_RATIO, snapshotCompactionStat::getActualAmplificationRatio);
getGaugeMetric(COMPACTION_COUNT, () -> snapshotCompactionStat.addAndGetNumberCompaction(0));
getGaugeMetric(COMPACTION_SIZE, snapshotCompactionStat::getCompactionSize);
getGaugeMetric(COMPACTION_DURATION, snapshotCompactionStat::getCompactionDuration);
}
}