Package com.yahoo.vespa.http.client.core

Class ThrottlePolicy

java.lang.Object

com.yahoo.vespa.http.client.core.ThrottlePolicy

public class ThrottlePolicy
extends Object

Class that has a method for finding next maxInFlight.

Author:

dybis

Field Summary

Fields

Modifier and Type	Field	Description
static double	SMALL_DIFFERENCE_IN_SUCCESSES_RATIO

Constructor Summary

Constructors

Constructor	Description
ThrottlePolicy()

Method Summary

Modifier and Type	Method	Description
int	calcNewMaxInFlight(double maxPerformanceChange, int numOk, int previousNumOk, int previousMaxInFlight, int maxInFlightNow, boolean messagesQueued)	Generate nex in-flight value for throttling.

Methods inherited from class java.lang.Object

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

Field Detail

SMALL_DIFFERENCE_IN_SUCCESSES_RATIO

public static final double SMALL_DIFFERENCE_IN_SUCCESSES_RATIO

See Also:

Constant Field Values

Constructor Detail

ThrottlePolicy

public ThrottlePolicy()

Method Detail

calcNewMaxInFlight

public int calcNewMaxInFlight(double maxPerformanceChange,
                              int numOk,
                              int previousNumOk,
                              int previousMaxInFlight,
                              int maxInFlightNow,
                              boolean messagesQueued)

Generate nex in-flight value for throttling.

Parameters:

maxPerformanceChange - This value limit the dynamics of the algorithm.

numOk - number of success in last phase

previousNumOk - number of success in previous (before last) phase.

previousMaxInFlight - number of max-in-flight in previous (before last) phase.

maxInFlightNow - number of max-in-flight in last phase.

messagesQueued - if any messages where queued.

Returns:

The new value to be used for max-in-flight (should be cropped externally to fit max/min values).