FixedReservoirHistogram

java.lang.Object
- org.apache.iceberg.metrics.FixedReservoirHistogram

All Implemented Interfaces:: Histogram

public class FixedReservoirHistogram
extends java.lang.Object
implements Histogram

A Histogram implementation with reservoir sampling.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.iceberg.metrics.Histogram
  Histogram.Statistics

Constructor Summary

Constructors
Constructor Description

FixedReservoirHistogram(int reservoirSize)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`count()`	Return the number of observations.
`Histogram.Statistics`	`statistics()`	Naive algorithm for calculating variance: https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
`void`	`update(long value)`	Update the histogram with a new value observed.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FixedReservoirHistogram
```
public FixedReservoirHistogram(int reservoirSize)
```
- Method Detail
  - count
```
public int count()
```
    Description copied from interface: Histogram
    
    Return the number of observations.
    
    Specified by:
    
    count in interface Histogram
  - update
```
public void update(long value)
```
    Description copied from interface: Histogram
    
    Update the histogram with a new value observed.
    
    Specified by:
    
    update in interface Histogram
  - statistics
```
public Histogram.Statistics statistics()
```
    Naive algorithm for calculating variance: https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
    
    Specified by:
    
    statistics in interface Histogram