Package org.apache.iceberg.metrics

Interface Histogram.Statistics

Enclosing interface:
Histogram
public static interface Histogram.Statistics

  • Method Summary

    Modifier and Type
    Method
    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 Details

    • 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