org.apache.flink.runtime.state.gemini.engine.metrics.FileCompactionMetrics 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.filecompaction.FileCompactionStat;
/**
* Metrics for file compaction.
*/
public class FileCompactionMetrics extends MetricsBase {
/**
* Amplification ratio.
*/
private static final String AMPLIFICATION_RATIO = "ratio";
/**
* Number of file compaction.
*/
private static final String COMPACTION_COUNT = "count";
/**
* Size of data to transfer in the latest compaction.
*/
private static final String TRANSFER_RATIO = "size";
/**
* Duration of latest compaction.
*/
private static final String COMPACTION_DURATION = "duration";
public FileCompactionMetrics(
MetricGroup metricGroup,
int sampleCountInterval,
int histogramWindowSize) {
super(metricGroup, sampleCountInterval, histogramWindowSize);
}
public void register(FileCompactionStat fileCompactionStatStat) {
getGaugeMetric(AMPLIFICATION_RATIO, fileCompactionStatStat::getAmplificationRatio);
getGaugeMetric(COMPACTION_COUNT, () -> fileCompactionStatStat.addAndGetNumberCompaction(0));
getGaugeMetric(TRANSFER_RATIO, fileCompactionStatStat::getTransferSize);
getGaugeMetric(COMPACTION_DURATION, fileCompactionStatStat::getCompactionDuration);
}
}