Package org.apache.hadoop.hbase.regionserver

Class MemStoreSize

java.lang.Object

org.apache.hadoop.hbase.regionserver.MemStoreSize

@LimitedPrivate("Coprocesssor")
public class MemStoreSize
extends Object

Data structure of three longs. Convenient package in which to carry current state of three counters.

Immutable!

See Also:

• MemStoreSizing

Field Summary

Fields

Modifier and Type	Field	Description
private final int	cellsCount
private final long	dataSize	'dataSize' tracks the Cell's data bytes size alone (Key bytes, value bytes).
private final long	heapSize	'getHeapSize' tracks all Cell's heap size occupancy.
private final long	offHeapSize	off-heap size: the aggregated size of all data that is allocated off-heap including all key-values that reside off-heap and the metadata that resides off-heap

Constructor Summary

Constructors

Constructor	Description
MemStoreSize()	Package private constructor.
MemStoreSize(long dataSize, long heapSize, long offHeapSize, int cellsCount)	Package private constructor.
MemStoreSize(MemStoreSize memStoreSize)	Package private constructor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
int	getCellsCount()
long	getDataSize()
long	getHeapSize()
long	getOffHeapSize()
int	hashCode()
boolean	isEmpty()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

dataSize

private final long dataSize

'dataSize' tracks the Cell's data bytes size alone (Key bytes, value bytes). A cell's data can be in on heap or off heap area depending on the MSLAB and its configuration to be using on heap or off heap LABs

heapSize

private final long heapSize

'getHeapSize' tracks all Cell's heap size occupancy. This will include Cell POJO heap overhead. When Cells in on heap area, this will include the cells data size as well.

offHeapSize

private final long offHeapSize

off-heap size: the aggregated size of all data that is allocated off-heap including all key-values that reside off-heap and the metadata that resides off-heap

cellsCount

private final int cellsCount

Constructor Details

MemStoreSize

MemStoreSize()

Package private constructor.

MemStoreSize

MemStoreSize(long dataSize,
 long heapSize,
 long offHeapSize,
 int cellsCount)

Package private constructor.

MemStoreSize

MemStoreSize(MemStoreSize memStoreSize)

Package private constructor.

Method Details

isEmpty

public boolean isEmpty()

getDataSize

public long getDataSize()

getHeapSize

public long getHeapSize()

getOffHeapSize

public long getOffHeapSize()

getCellsCount

public int getCellsCount()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object