org.apache.giraph.utils

Class MemoryUtils

java.lang.Object

org.apache.giraph.utils.MemoryUtils

public class MemoryUtils
extends Object

Helper static methods for tracking memory usage.

Method Summary

Modifier and Type	Method and Description
static double	freeMemoryFraction() Get fraction of memory that's free
static double	freeMemoryMB() Get free memory in megabytes
static double	freePlusUnallocatedMemoryMB() Get free plus unallocated memory in megabytes
static String	getRuntimeMemoryStats() Get stringified runtime memory stats
static void	initMetrics() Initialize metrics tracked by this helper.
static double	maxMemoryMB() Get maximum memory in megabytes
static double	totalMemoryMB() Get total memory in megabytes

Methods inherited from class java.lang.Object

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

Method Detail

totalMemoryMB

public static double totalMemoryMB()

Get total memory in megabytes

Returns:

total memory in megabytes

maxMemoryMB

public static double maxMemoryMB()

Get maximum memory in megabytes

Returns:

maximum memory in megabytes

freeMemoryMB

public static double freeMemoryMB()

Get free memory in megabytes

Returns:

free memory in megabytes

freePlusUnallocatedMemoryMB

public static double freePlusUnallocatedMemoryMB()

Get free plus unallocated memory in megabytes

Returns:

free plus unallocated memory in megabytes

freeMemoryFraction

public static double freeMemoryFraction()

Get fraction of memory that's free

Returns:

Fraction of memory that's free

initMetrics

public static void initMetrics()

Initialize metrics tracked by this helper.

getRuntimeMemoryStats

public static String getRuntimeMemoryStats()

Get stringified runtime memory stats

Returns:

String of all Runtime stats.