com.netflix.concurrency.limits.limit

Class GradientLimit

java.lang.Object

com.netflix.concurrency.limits.limit.GradientLimit

All Implemented Interfaces:

Limit

public final class GradientLimit
extends java.lang.Object
implements Limit

Concurrency limit algorithm that adjust the limits based on the gradient of change in the samples minimum RTT and absolute minimum RTT allowing for a queue of square root of the current limit. Why square root? Because it's better than a fixed queue size that becomes too small for large limits but still prevents the limit from growing too much by slowing down growth as the limit grows.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GradientLimit.Builder

Nested classes/interfaces inherited from interface com.netflix.concurrency.limits.Limit

Limit.SampleWindow

Method Summary

Modifier and Type	Method and Description
int	getLimit()
long	getRttNoLoad()
static GradientLimit.Builder	newBuilder()
static GradientLimit	newDefault()
java.lang.String	toString()
void	update(Limit.SampleWindow sample) Update the concurrency limit using a new rtt sample

Methods inherited from class java.lang.Object

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

Method Detail

newBuilder

public static GradientLimit.Builder newBuilder()

newDefault

public static GradientLimit newDefault()

update

public void update(Limit.SampleWindow sample)

Description copied from interface: Limit

Update the concurrency limit using a new rtt sample

Specified by:

update in interface Limit

Parameters:

sample - Data from the last sampling window such as RTT

getLimit

public int getLimit()

Specified by:

getLimit in interface Limit

Returns:

Current estimated limit

getRttNoLoad

public long getRttNoLoad()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object