Package org.jboss.test.clusterbench.common.load

Class MemoryUsageStress

java.lang.Object

org.jboss.test.clusterbench.common.load.MemoryUsageStress

public class MemoryUsageStress
extends Object

Stressing MemoryUsageStress

Author:

Michal Babacek Some reading: http://docs.oracle.com/javase/6/docs/api/java/lang/management/MemoryUsage.html http://stackoverflow.com/questions/3422557/sun-jvm-committed-virtual-memory-high-consumption

Constructor Summary

Constructors

Constructor	Description
MemoryUsageStress()

Method Summary

Modifier and Type	Method	Description
long	getFreePhysical()
MemoryUsage	getHeapMem()
MemoryUsage	getNonHeapMem()
String	getStats()
long	getTotalPhysical()
String	stressSystemMemory(int megabytes, int milliseconds)	stressSystemMemory JVM will be forced to put up a specified number of megabytes, thus affecting both memory allocated for JVM already and possible the physical memory as well (in case JVM will have to ask for more memory up to the maxMem constant).

Methods inherited from class java.lang.Object

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

Constructor Details

MemoryUsageStress

public MemoryUsageStress()

Method Details

stressSystemMemory

public String stressSystemMemory(int megabytes,
 int milliseconds)

stressSystemMemory JVM will be forced to put up a specified number of megabytes, thus affecting both memory allocated for JVM already and possible the physical memory as well (in case JVM will have to ask for more memory up to the maxMem constant).

Parameters:

megabytes -

milliseconds -

Returns:

status before and after the stress

getFreePhysical

public long getFreePhysical()
                     throws JMException

Throws:

JMException

getTotalPhysical

public long getTotalPhysical()
                      throws JMException

Throws:

JMException

getHeapMem

public MemoryUsage getHeapMem()

getNonHeapMem

public MemoryUsage getNonHeapMem()

getStats

public String getStats()
                throws JMException

Throws:

JMException