io.airlift.stats

Class ExponentialDecay

java.lang.Object

io.airlift.stats.ExponentialDecay

public final class ExponentialDecay
extends Object

Method Summary

Modifier and Type	Method and Description
static double	computeAlpha(double targetWeight, long targetAgeInSeconds) Compute the alpha decay factor such that the weight of an entry with age 'targetAgeInSeconds' is targetWeight'
static double	fifteenMinutes()
static double	fiveMinutes()
static double	oneMinute()
static double	seconds(int seconds)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

oneMinute

public static double oneMinute()

fiveMinutes

public static double fiveMinutes()

fifteenMinutes

public static double fifteenMinutes()

seconds

public static double seconds(int seconds)

computeAlpha

public static double computeAlpha(double targetWeight,
                                  long targetAgeInSeconds)

Compute the alpha decay factor such that the weight of an entry with age 'targetAgeInSeconds' is targetWeight'