Package com.cloudbees.jenkins.support.threaddump

Class HighLoadCpuChecker

java.lang.Object

java.util.TimerTask

hudson.triggers.SafeTimerTask

hudson.model.PeriodicWork

com.cloudbees.jenkins.support.threaddump.HighLoadCpuChecker

All Implemented Interfaces:

ExtensionPoint, Runnable

@Extension
public class HighLoadCpuChecker
extends PeriodicWork

PeriodicWork to check when there is a high load in the instance. Only checking high CPU usage for the moment, but it can be used to generate thread dumps in high heap memory consumption.

Nested Class Summary

Nested classes/interfaces inherited from class hudson.triggers.SafeTimerTask

SafeTimerTask.ExceptionRunnable

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

ExtensionPoint.LegacyInstancesAreScopedToHudson

Field Summary

Fields

Modifier and Type	Field	Description
static final Double	CPU_USAGE_THRESHOLD	This is the CPU usage threshold.
static final int	HIGH_CPU_CONSECUTIVE_TIMES	Consecutive high CPUs to take a thread dump
static final int	HIGH_CPU_THREAD_DUMPS_TO_RETAIN	Limit the number of thread dumps to retain on high cpu
protected final FileListCap	logs	Thread dumps generated on high CPU load are stored in $JENKINS_HOME/high-load/cpu
static final int	RECURRENCE_PERIOD_SEC	Recurrence period to check high cpu load consumption.

Fields inherited from class hudson.model.PeriodicWork

DAY, HOUR, logger, MIN

Constructor Summary

Constructors

Constructor	Description
HighLoadCpuChecker()

Method Summary

Modifier and Type	Method	Description
protected void	doRun()
long	getRecurrencePeriod()

Methods inherited from class hudson.model.PeriodicWork

all, getInitialDelay, init

Methods inherited from class hudson.triggers.SafeTimerTask

getLogsRoot, of, run

Methods inherited from class java.util.TimerTask

cancel, scheduledExecutionTime

Methods inherited from class java.lang.Object

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

Field Details

RECURRENCE_PERIOD_SEC

public static final int RECURRENCE_PERIOD_SEC

Recurrence period to check high cpu load consumption. Thread dumps after there are CONSECUTIVE_HIGH_CPU in the RECURRENCE_PERIOD_SEC

HIGH_CPU_CONSECUTIVE_TIMES

public static final int HIGH_CPU_CONSECUTIVE_TIMES

Consecutive high CPUs to take a thread dump

CPU_USAGE_THRESHOLD

public static final Double CPU_USAGE_THRESHOLD

This is the CPU usage threshold. Determinate de percentage of the total CPU used across all the cores available

HIGH_CPU_THREAD_DUMPS_TO_RETAIN

public static final int HIGH_CPU_THREAD_DUMPS_TO_RETAIN

Limit the number of thread dumps to retain on high cpu

logs

protected final FileListCap logs

Thread dumps generated on high CPU load are stored in $JENKINS_HOME/high-load/cpu

Constructor Details

HighLoadCpuChecker

public HighLoadCpuChecker()

Method Details

getRecurrencePeriod

public long getRecurrencePeriod()

Specified by:

getRecurrencePeriod in class PeriodicWork

doRun

protected void doRun()
              throws Exception

Specified by:

doRun in class SafeTimerTask

Throws:

Exception