org.apache.reef.util

Class MemoryUtils

java.lang.Object

org.apache.reef.util.MemoryUtils

public final class MemoryUtils
extends Object

Utility class to report current and peak memory usage. Structured to be used while logging. Is useful for debugging memory issues

Method Summary

Methods

Modifier and Type	Method and Description
static long	currentEdenMemoryUsageMB()
static long	currentOldMemoryUsageMB()
static long	currentPermMemoryUsageMB()
static int	getTotalPhysicalMemorySizeInMB() Returns the total amount of physical memory on the current machine in megabytes.
static void	main(String[] args)
static String	memPoolNames()
static long	peakEdenMemoryUsageMB()
static long	peakOldMemoryUsageMB()
static long	peakPermMemoryUsageMB()
static void	resetPeakUsage()

Methods inherited from class java.lang.Object

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

Method Detail

memPoolNames

public static String memPoolNames()

currentEdenMemoryUsageMB

public static long currentEdenMemoryUsageMB()

currentOldMemoryUsageMB

public static long currentOldMemoryUsageMB()

currentPermMemoryUsageMB

public static long currentPermMemoryUsageMB()

peakEdenMemoryUsageMB

public static long peakEdenMemoryUsageMB()

peakOldMemoryUsageMB

public static long peakOldMemoryUsageMB()

peakPermMemoryUsageMB

public static long peakPermMemoryUsageMB()

resetPeakUsage

public static void resetPeakUsage()

getTotalPhysicalMemorySizeInMB

public static int getTotalPhysicalMemorySizeInMB()

Returns the total amount of physical memory on the current machine in megabytes. Some JVMs may not support the underlying API call.

Returns:

memory size in MB if the call succeeds; -1 otherwise

main

public static void main(String[] args)