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HBASE-23245 : MutableHistogram constructor changes and provide HistogramImpl maxExpected as long (#787) 

Signed-off-by: Andrew Purtell <apurtell@apache.org>
Signed-off-by: Xu Cang <xucang@apache.org> 
Signed-off-by: Guangxu Cheng <gxcheng@apache.org>
This commit is contained in:
Viraj Jasani 2019-11-11 21:52:02 +05:30 committed by Guangxu Cheng
parent da06aa7f1f
commit 9cc144e3c7
6 changed files with 32 additions and 29 deletions
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4
hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/lib/MutableHistogram.java
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@ -42,10 +42,6 @@ public class MutableHistogram extends MutableMetric implements MetricHistogram {
}
public MutableHistogram(String name, String description) {
this(name, description, Integer.MAX_VALUE << 2);
}
protected MutableHistogram(String name, String description, long maxExpected) {
this.name = StringUtils.capitalize(name);
this.desc = StringUtils.uncapitalize(description);
this.histogram = new HistogramImpl();

6
hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/lib/MutableRangeHistogram.java
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@ -36,11 +36,7 @@ public abstract class MutableRangeHistogram extends MutableHistogram implements
}
public MutableRangeHistogram(String name, String description) {
this(name, description, Integer.MAX_VALUE << 2);
}
public MutableRangeHistogram(String name, String description, long expectedMax) {
super(name, description, expectedMax);
super(name, description);
}
/**

7
hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/lib/MutableSizeHistogram.java
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@ -26,6 +26,7 @@ import org.apache.yetus.audience.InterfaceAudience;
*/
@InterfaceAudience.Private
public class MutableSizeHistogram extends MutableRangeHistogram {
private final static String RANGE_TYPE = "SizeRangeCount";
private final static long[] RANGES = {10,100,1000,10000,100000,1000000,10000000,100000000};
@ -34,11 +35,7 @@ public class MutableSizeHistogram extends MutableRangeHistogram {
}
public MutableSizeHistogram(String name, String description) {
this(name, description, RANGES[RANGES.length-2]);
}
public MutableSizeHistogram(String name, String description, long expectedMax) {
super(name, description, expectedMax);
super(name, description);
}
@Override

6
hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/lib/MutableTimeHistogram.java
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@ -35,11 +35,7 @@ public class MutableTimeHistogram extends MutableRangeHistogram {
}
public MutableTimeHistogram(String name, String description) {
this(name, description, RANGES[RANGES.length - 2]);
}
public MutableTimeHistogram(String name, String description, long expectedMax) {
super(name, description, expectedMax);
super(name, description);
}
@Override

2
hbase-metrics/src/main/java/org/apache/hadoop/hbase/metrics/impl/HistogramImpl.java
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@ -36,7 +36,7 @@ public class HistogramImpl implements Histogram {
private final CounterImpl counter;
public HistogramImpl() {
this(Integer.MAX_VALUE << 2);
this((long) Integer.MAX_VALUE << 2);
}
public HistogramImpl(long maxExpected) {

36
hbase-metrics/src/test/java/org/apache/hadoop/hbase/metrics/impl/TestHistogramImpl.java
View File

@ -63,19 +63,19 @@ public class TestHistogramImpl {
Snapshot snapshot = histogram.snapshot();
assertEquals(100, snapshot.getCount());
assertEquals(50, snapshot.getMedian());
assertEquals(49, snapshot.getMedian());
assertEquals(49, snapshot.getMean());
assertEquals(0, snapshot.getMin());
assertEquals(99, snapshot.getMax());
assertEquals(25, snapshot.get25thPercentile());
assertEquals(75, snapshot.get75thPercentile());
assertEquals(90, snapshot.get90thPercentile());
assertEquals(95, snapshot.get95thPercentile());
assertEquals(98, snapshot.get98thPercentile());
assertEquals(99, snapshot.get99thPercentile());
assertEquals(99, snapshot.get999thPercentile());
assertEquals(24, snapshot.get25thPercentile());
assertEquals(74, snapshot.get75thPercentile());
assertEquals(89, snapshot.get90thPercentile());
assertEquals(94, snapshot.get95thPercentile());
assertEquals(97, snapshot.get98thPercentile());
assertEquals(98, snapshot.get99thPercentile());
assertEquals(98, snapshot.get999thPercentile());
assertEquals(51, snapshot.getCountAtOrBelow(50));
assertEquals(100, snapshot.getCountAtOrBelow(50));
// check that histogram is reset.
assertEquals(100, histogram.getCount()); // count does not reset
@ -98,5 +98,23 @@ public class TestHistogramImpl {
assertEquals(198, snapshot.get98thPercentile());
assertEquals(199, snapshot.get99thPercentile());
assertEquals(199, snapshot.get999thPercentile());
IntStream.range(500, 1000).forEach(histogram::update);
snapshot = histogram.snapshot();
assertEquals(500, snapshot.getCount());
assertEquals(749, snapshot.getMedian());
assertEquals(749, snapshot.getMean());
assertEquals(500, snapshot.getMin());
assertEquals(999, snapshot.getMax());
assertEquals(624, snapshot.get25thPercentile());
assertEquals(874, snapshot.get75thPercentile());
assertEquals(949, snapshot.get90thPercentile());
assertEquals(974, snapshot.get95thPercentile());
assertEquals(989, snapshot.get98thPercentile());
assertEquals(994, snapshot.get99thPercentile());
assertEquals(998, snapshot.get999thPercentile());
}
}