org.apache.hadoop.hbase.regionserver

类 HeapMemoryManager

java.lang.Object

org.apache.hadoop.hbase.regionserver.HeapMemoryManager

@InterfaceAudience.Private
public class HeapMemoryManager
extends Object

Manages tuning of Heap memory using HeapMemoryTuner. Most part of the heap memory is split between Memstores and BlockCache. This manager helps in tuning sizes of both these dynamically, as per the R/W load on the servers.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	HeapMemoryManager.HeapMemoryTuneObserver Every class that wants to observe heap memory tune actions must implement this interface.
static class	HeapMemoryManager.TunerContext POJO to pass all the relevant information required to do the heap memory tuning.
static class	HeapMemoryManager.TunerResult POJO which holds the result of memory tuning done by HeapMemoryTuner implementation.

字段概要

字段

限定符和类型	字段和说明
static String	BLOCK_CACHE_SIZE_MAX_RANGE_KEY
static String	BLOCK_CACHE_SIZE_MIN_RANGE_KEY
static String	HBASE_RS_HEAP_MEMORY_TUNER_CLASS
static int	HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD
static String	HBASE_RS_HEAP_MEMORY_TUNER_PERIOD
static float	HEAP_OCCUPANCY_ERROR_VALUE
static String	MEMSTORE_SIZE_MAX_RANGE_KEY
static String	MEMSTORE_SIZE_MIN_RANGE_KEY

方法概要

限定符和类型	方法和说明
static HeapMemoryManager	create(org.apache.hadoop.conf.Configuration conf, FlushRequester memStoreFlusher, Server server, RegionServerAccounting regionServerAccounting)
float	getHeapOccupancyPercent()
void	registerTuneObserver(HeapMemoryManager.HeapMemoryTuneObserver observer)
void	start(ChoreService service)
void	stop()

从类继承的方法 java.lang.Object

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

字段详细资料

BLOCK_CACHE_SIZE_MAX_RANGE_KEY

public static final String BLOCK_CACHE_SIZE_MAX_RANGE_KEY

另请参阅:

常量字段值

BLOCK_CACHE_SIZE_MIN_RANGE_KEY

public static final String BLOCK_CACHE_SIZE_MIN_RANGE_KEY

另请参阅:

常量字段值

MEMSTORE_SIZE_MAX_RANGE_KEY

public static final String MEMSTORE_SIZE_MAX_RANGE_KEY

另请参阅:

常量字段值

MEMSTORE_SIZE_MIN_RANGE_KEY

public static final String MEMSTORE_SIZE_MIN_RANGE_KEY

另请参阅:

常量字段值

HBASE_RS_HEAP_MEMORY_TUNER_PERIOD

public static final String HBASE_RS_HEAP_MEMORY_TUNER_PERIOD

另请参阅:

常量字段值

HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD

public static final int HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD

另请参阅:

常量字段值

HBASE_RS_HEAP_MEMORY_TUNER_CLASS

public static final String HBASE_RS_HEAP_MEMORY_TUNER_CLASS

另请参阅:

常量字段值

HEAP_OCCUPANCY_ERROR_VALUE

public static final float HEAP_OCCUPANCY_ERROR_VALUE

另请参阅:

常量字段值

方法详细资料

create

public static HeapMemoryManager create(org.apache.hadoop.conf.Configuration conf,
                                       FlushRequester memStoreFlusher,
                                       Server server,
                                       RegionServerAccounting regionServerAccounting)

start

public void start(ChoreService service)

stop

public void stop()

registerTuneObserver

public void registerTuneObserver(HeapMemoryManager.HeapMemoryTuneObserver observer)

getHeapOccupancyPercent

public float getHeapOccupancyPercent()

返回:

heap occupancy percentage, 0 <= n <= 1. or -0.0 for error asking JVM