org.apache.iceberg.metrics

Interface Histogram.Statistics

Enclosing interface:

Histogram

public static interface Histogram.Statistics

Method Summary

Modifier and Type	Method and Description
long	max() Returns the maximum value of the histogram observations.
double	mean() Returns the mean value of the histogram observations.
long	min() Returns the minimum value of the histogram observations.
long	percentile(double percentile) Returns the percentile value based on the histogram statistics.
int	size() Return the number of values that the statistics computation is based on.
double	stdDev() Returns the standard deviation of the histogram distribution.

Method Detail

size

int size()

Return the number of values that the statistics computation is based on.

If the number of sampling is less than the reservoir size, the sampling count should be returned. Otherwise, the reservoir size is returned.

mean

double mean()

Returns the mean value of the histogram observations.

stdDev

double stdDev()

Returns the standard deviation of the histogram distribution.

max

long max()

Returns the maximum value of the histogram observations.

min

long min()

Returns the minimum value of the histogram observations.

percentile

long percentile(double percentile)

Returns the percentile value based on the histogram statistics.

Parameters:

percentile - percentile point in double. E.g., 0.75 means 75 percentile. It is up to the implementation to decide what valid percentile points are supported.

Returns:

Value for the given percentile