HeapMemoryManager (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.regionserver.HeapMemoryManager

@InterfaceAudience.Private
public class HeapMemoryManager
extends Object

Manages tuning of Heap memory using HeapMemoryTuner.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`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.

Field Summary

Fields
Modifier and Type	Field and Description
`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`

Method Summary

Methods
Modifier and Type	Method and Description
`static HeapMemoryManager`	`create(org.apache.hadoop.conf.Configuration conf, FlushRequester memStoreFlusher, Server server, RegionServerAccounting regionServerAccounting)`
`float`	`getHeapOccupancyPercent()`
`void`	`start(ChoreService service)`
`void`	`stop()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- BLOCK_CACHE_SIZE_MAX_RANGE_KEY
```
public static final String BLOCK_CACHE_SIZE_MAX_RANGE_KEY
```
  See Also:
  Constant Field Values
- BLOCK_CACHE_SIZE_MIN_RANGE_KEY
```
public static final String BLOCK_CACHE_SIZE_MIN_RANGE_KEY
```
  See Also:
  Constant Field Values
- MEMSTORE_SIZE_MAX_RANGE_KEY
```
public static final String MEMSTORE_SIZE_MAX_RANGE_KEY
```
  See Also:
  Constant Field Values
- MEMSTORE_SIZE_MIN_RANGE_KEY
```
public static final String MEMSTORE_SIZE_MIN_RANGE_KEY
```
  See Also:
  Constant Field Values
- HBASE_RS_HEAP_MEMORY_TUNER_PERIOD
```
public static final String HBASE_RS_HEAP_MEMORY_TUNER_PERIOD
```
  See Also:
  Constant Field Values
- HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD
```
public static final int HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD
```
  See Also:
  Constant Field Values
- HBASE_RS_HEAP_MEMORY_TUNER_CLASS
```
public static final String HBASE_RS_HEAP_MEMORY_TUNER_CLASS
```
  See Also:
  Constant Field Values
- HEAP_OCCUPANCY_ERROR_VALUE
```
public static final float HEAP_OCCUPANCY_ERROR_VALUE
```
  See Also:
  Constant Field Values

Method Detail

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()
```

getHeapOccupancyPercent
```
public float getHeapOccupancyPercent()
```
Returns:
heap occupancy percentage, 0 <= n <= 1. or -0.0 for error asking JVM

Class HeapMemoryManager

Nested Class Summary

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BLOCK_CACHE_SIZE_MAX_RANGE_KEY

BLOCK_CACHE_SIZE_MIN_RANGE_KEY

MEMSTORE_SIZE_MAX_RANGE_KEY

MEMSTORE_SIZE_MIN_RANGE_KEY

HBASE_RS_HEAP_MEMORY_TUNER_PERIOD

HBASE_RS_HEAP_MEMORY_TUNER_DEFAULT_PERIOD

HBASE_RS_HEAP_MEMORY_TUNER_CLASS

HEAP_OCCUPANCY_ERROR_VALUE

Method Detail

create

start

stop

getHeapOccupancyPercent