HeapMemoryManager (Apache HBase 1.2.12 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
`private class`	`HeapMemoryManager.HeapMemoryTunerChore`
`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`
`private ResizableBlockCache`	`blockCache`
`private float`	`blockCachePercent`
`private float`	`blockCachePercentMaxRange`
`private float`	`blockCachePercentMinRange`
`private static int`	`CLUSTER_MINIMUM_MEMORY_THRESHOLD`
`private static int`	`CONVERT_TO_PERCENTAGE`
`private int`	`defaultChorePeriod`
`private float`	`globalMemStorePercent`
`private float`	`globalMemStorePercentMaxRange`
`private float`	`globalMemStorePercentMinRange`
`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`
`private HeapMemoryManager.HeapMemoryTunerChore`	`heapMemTunerChore`
`private float`	`heapOccupancyLowWatermark`
`private float`	`heapOccupancyPercent`
`private float`	`l2BlockCachePercent`
`private static org.apache.commons.logging.Log`	`LOG`
`private long`	`maxHeapSize`
`static String`	`MEMSTORE_SIZE_MAX_RANGE_KEY`
`static String`	`MEMSTORE_SIZE_MIN_RANGE_KEY`
`private FlushRequester`	`memStoreFlusher`
`private RegionServerAccounting`	`regionServerAccounting`
`private Server`	`server`
`private boolean`	`tunerOn`

Constructor Summary

Constructors
Constructor and Description
`HeapMemoryManager(ResizableBlockCache blockCache, FlushRequester memStoreFlusher, Server server, RegionServerAccounting regionServerAccounting)`

Method Summary

Methods
Modifier and Type	Method and Description
`static HeapMemoryManager`	`create(org.apache.hadoop.conf.Configuration conf, FlushRequester memStoreFlusher, Server server, RegionServerAccounting regionServerAccounting)`
`private boolean`	`doInit(org.apache.hadoop.conf.Configuration conf)`
`float`	`getHeapOccupancyPercent()`
`(package private) boolean`	`isTunerOn()`
`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

LOG

private static final org.apache.commons.logging.Log LOG

CONVERT_TO_PERCENTAGE
```
private static final int CONVERT_TO_PERCENTAGE
```
See Also:
Constant Field Values

CLUSTER_MINIMUM_MEMORY_THRESHOLD
```
private static final int CLUSTER_MINIMUM_MEMORY_THRESHOLD
```
See Also:
Constant Field Values

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

globalMemStorePercent
```
private float globalMemStorePercent
```

globalMemStorePercentMinRange

private float globalMemStorePercentMinRange

globalMemStorePercentMaxRange

private float globalMemStorePercentMaxRange

blockCachePercent
```
private float blockCachePercent
```

blockCachePercentMinRange

private float blockCachePercentMinRange

blockCachePercentMaxRange

private float blockCachePercentMaxRange

l2BlockCachePercent
```
private float l2BlockCachePercent
```

heapOccupancyPercent
```
private float heapOccupancyPercent
```

blockCache

private final ResizableBlockCache blockCache

memStoreFlusher

private final FlushRequester memStoreFlusher

server
```
private final Server server
```

regionServerAccounting

private final RegionServerAccounting regionServerAccounting

heapMemTunerChore

private HeapMemoryManager.HeapMemoryTunerChore heapMemTunerChore

tunerOn
```
private final boolean tunerOn
```

defaultChorePeriod
```
private final int defaultChorePeriod
```

heapOccupancyLowWatermark

private final float heapOccupancyLowWatermark

maxHeapSize
```
private final long maxHeapSize
```

Constructor Detail

HeapMemoryManager

HeapMemoryManager(ResizableBlockCache blockCache,
                 FlushRequester memStoreFlusher,
                 Server server,
                 RegionServerAccounting regionServerAccounting)

Method Detail

create

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

doInit

private boolean doInit(org.apache.hadoop.conf.Configuration conf)

start

public void start(ChoreService service)

stop
```
public void stop()
```

isTunerOn
```
boolean isTunerOn()
```

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

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOG

CONVERT_TO_PERCENTAGE

CLUSTER_MINIMUM_MEMORY_THRESHOLD

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

globalMemStorePercent

globalMemStorePercentMinRange

globalMemStorePercentMaxRange

blockCachePercent

blockCachePercentMinRange

blockCachePercentMaxRange

l2BlockCachePercent

heapOccupancyPercent

blockCache

memStoreFlusher

server

regionServerAccounting

heapMemTunerChore

tunerOn

defaultChorePeriod

heapOccupancyLowWatermark

maxHeapSize

Constructor Detail

HeapMemoryManager

Method Detail

create

doInit

start

stop

isTunerOn

getHeapOccupancyPercent