com.hazelcast.memory

Class DefaultMemoryStats

java.lang.Object

com.hazelcast.memory.DefaultMemoryStats

All Implemented Interfaces:

MemoryStats

public class DefaultMemoryStats
extends Object
implements MemoryStats

Default implementation of MemoryStats.

Constructor Summary

Constructors

Constructor and Description
DefaultMemoryStats()

Method Summary

Modifier and Type	Method and Description
long	getCommittedHeap() Returns the amount of memory in bytes that is committed for the Java virtual machine to use.
long	getCommittedNative() Returns the amount of native memory in bytes that is committed for current HazelcastInstance to use.
long	getFreeHeap() Returns the amount of free memory in the JVM in bytes.
long	getFreeNative() Returns the amount of free native memory in current HazelcastInstance in bytes.
long	getFreePhysical() Returns free physical memory available in OS.
GarbageCollectorStats	getGCStats() Returns the garbage collector statistics for the JVM
long	getMaxHeap() Returns the maximum amount of memory that the JVM will attempt to use in bytes.
long	getMaxMetadata() Returns the amount of native memory reserved for metadata.
long	getMaxNative() Returns the maximum amount of native memory that current HazelcastInstance will attempt to use in bytes.
long	getTotalPhysical() Returns total physical memory available in OS.
long	getUsedHeap() Returns the amount of used memory in the JVM in bytes.
long	getUsedMetadata()
long	getUsedNative() Returns the amount of used native memory in current HazelcastInstance in bytes.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultMemoryStats

public DefaultMemoryStats()

Method Detail

getTotalPhysical

public final long getTotalPhysical()

Description copied from interface: MemoryStats

Returns total physical memory available in OS.

Specified by:

getTotalPhysical in interface MemoryStats

Returns:

total physical memory in bytes.

getFreePhysical

public final long getFreePhysical()

Description copied from interface: MemoryStats

Returns free physical memory available in OS.

Some operating systems have cached memory regions in which they store hot cached resources like files. Cached memory is used for allocations when required. So although this cached region is assumed as free, operating systems generally report this region as used not free.

Specified by:

getFreePhysical in interface MemoryStats

Returns:

free physical memory in bytes.

getMaxHeap

public final long getMaxHeap()

Description copied from interface: MemoryStats

Returns the maximum amount of memory that the JVM will attempt to use in bytes.

Specified by:

getMaxHeap in interface MemoryStats

Returns:

the maximum amount of memory in bytes.

See Also:

Runtime.maxMemory()

getCommittedHeap

public final long getCommittedHeap()

Description copied from interface: MemoryStats

Returns the amount of memory in bytes that is committed for the Java virtual machine to use.

Specified by:

getCommittedHeap in interface MemoryStats

Returns:

the amount of committed memory in bytes.

See Also:

Runtime.totalMemory(), MemoryUsage.getCommitted()

getUsedHeap

public final long getUsedHeap()

Description copied from interface: MemoryStats

Returns the amount of used memory in the JVM in bytes.

Specified by:

getUsedHeap in interface MemoryStats

Returns:

the amount of used memory in bytes

See Also:

MemoryUsage.getUsed()

getFreeHeap

public final long getFreeHeap()

Description copied from interface: MemoryStats

Returns the amount of free memory in the JVM in bytes.

Specified by:

getFreeHeap in interface MemoryStats

Returns:

the amount of free memory in bytes

See Also:

Runtime.freeMemory()

getMaxNative

public long getMaxNative()

Description copied from interface: MemoryStats

Returns the maximum amount of native memory that current HazelcastInstance will attempt to use in bytes.

Specified by:

getMaxNative in interface MemoryStats

Returns:

the maximum amount of native memory in bytes.

getCommittedNative

public long getCommittedNative()

Description copied from interface: MemoryStats

Returns the amount of native memory in bytes that is committed for current HazelcastInstance to use.

Specified by:

getCommittedNative in interface MemoryStats

Returns:

the amount of committed native memory in bytes.

getUsedNative

public long getUsedNative()

Description copied from interface: MemoryStats

Returns the amount of used native memory in current HazelcastInstance in bytes.

Specified by:

getUsedNative in interface MemoryStats

Returns:

the amount of used native memory in bytes

getFreeNative

public long getFreeNative()

Description copied from interface: MemoryStats

Returns the amount of free native memory in current HazelcastInstance in bytes.

Specified by:

getFreeNative in interface MemoryStats

Returns:

the amount of free native memory in bytes

getMaxMetadata

public long getMaxMetadata()

Description copied from interface: MemoryStats

Returns the amount of native memory reserved for metadata. This memory is separate and not accounted for by the ...NativeMemory statistics.

Specified by:

getMaxMetadata in interface MemoryStats

getUsedMetadata

public long getUsedMetadata()

Specified by:

getUsedMetadata in interface MemoryStats

Returns:

amount of used metadata memory

getGCStats

public GarbageCollectorStats getGCStats()

Description copied from interface: MemoryStats

Returns the garbage collector statistics for the JVM

Specified by:

getGCStats in interface MemoryStats

Returns:

GC statistics

toString

public String toString()

Overrides:

toString in class Object