org.apache.flink.runtime.taskexecutor

Class BackPressureSampleService

java.lang.Object

org.apache.flink.runtime.taskexecutor.BackPressureSampleService

public class BackPressureSampleService
extends Object

Samples whether a task is back pressured multi times. The total number of samples divided by the number of back pressure samples reaches the back pressure ratio.

Method Summary

Modifier and Type	Method and Description
CompletableFuture<Double>	sampleTaskBackPressure(BackPressureSampleableTask task) Schedules to sample the task back pressure and returns a future that completes with the back pressure ratio.

Methods inherited from class java.lang.Object

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

Method Detail

sampleTaskBackPressure

public CompletableFuture<Double> sampleTaskBackPressure(BackPressureSampleableTask task)

Schedules to sample the task back pressure and returns a future that completes with the back pressure ratio.

Parameters:

task - The task to be sampled.

Returns:

A future containing the task back pressure ratio.