org.apache.hadoop.hbase.io.util

Class HeapMemorySizeUtil

java.lang.Object

org.apache.hadoop.hbase.io.util.HeapMemorySizeUtil

@InterfaceAudience.Private
public class HeapMemorySizeUtil
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static float	DEFAULT_MEMSTORE_SIZE
static float	DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT
static String	MEMSTORE_SIZE_KEY
static String	MEMSTORE_SIZE_LOWER_LIMIT_KEY
static String	MEMSTORE_SIZE_LOWER_LIMIT_OLD_KEY
static String	MEMSTORE_SIZE_OLD_KEY

Constructor Summary

Constructors

Constructor and Description
HeapMemorySizeUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static void	checkForClusterFreeMemoryLimit(org.apache.hadoop.conf.Configuration conf) Checks whether we have enough heap memory left out after portion for Memstore and Block cache.
static float	getBlockCacheHeapPercent(org.apache.hadoop.conf.Configuration conf) Retrieve configured size for on heap block cache as percentage of total heap.
static float	getGlobalMemStoreLowerMark(org.apache.hadoop.conf.Configuration c, float globalMemStorePercent) Retrieve configured size for global memstore lower water mark as percentage of total heap.
static float	getGlobalMemStorePercent(org.apache.hadoop.conf.Configuration c, boolean logInvalid) Retrieve global memstore configured size as percentage of total heap.
static float	getL2BlockCacheHeapPercent(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

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

Field Detail

MEMSTORE_SIZE_KEY

public static final String MEMSTORE_SIZE_KEY

See Also:

Constant Field Values

MEMSTORE_SIZE_OLD_KEY

public static final String MEMSTORE_SIZE_OLD_KEY

See Also:

Constant Field Values

MEMSTORE_SIZE_LOWER_LIMIT_KEY

public static final String MEMSTORE_SIZE_LOWER_LIMIT_KEY

See Also:

Constant Field Values

MEMSTORE_SIZE_LOWER_LIMIT_OLD_KEY

public static final String MEMSTORE_SIZE_LOWER_LIMIT_OLD_KEY

See Also:

Constant Field Values

DEFAULT_MEMSTORE_SIZE

public static final float DEFAULT_MEMSTORE_SIZE

See Also:

Constant Field Values

DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT

public static final float DEFAULT_MEMSTORE_SIZE_LOWER_LIMIT

See Also:

Constant Field Values

Constructor Detail

HeapMemorySizeUtil

public HeapMemorySizeUtil()

Method Detail

checkForClusterFreeMemoryLimit

public static void checkForClusterFreeMemoryLimit(org.apache.hadoop.conf.Configuration conf)

Checks whether we have enough heap memory left out after portion for Memstore and Block cache. We need atleast 20% of heap left out for other RS functions.

Parameters:

conf -

getGlobalMemStorePercent

public static float getGlobalMemStorePercent(org.apache.hadoop.conf.Configuration c,
                             boolean logInvalid)

Retrieve global memstore configured size as percentage of total heap.

Parameters:

c -

logInvalid -

getGlobalMemStoreLowerMark

public static float getGlobalMemStoreLowerMark(org.apache.hadoop.conf.Configuration c,
                               float globalMemStorePercent)

Retrieve configured size for global memstore lower water mark as percentage of total heap.

Parameters:

c -

globalMemStorePercent -

getBlockCacheHeapPercent

public static float getBlockCacheHeapPercent(org.apache.hadoop.conf.Configuration conf)

Retrieve configured size for on heap block cache as percentage of total heap.

Parameters:

conf -

getL2BlockCacheHeapPercent

public static float getL2BlockCacheHeapPercent(org.apache.hadoop.conf.Configuration conf)

Parameters:

conf -

Returns:

The on heap size for L2 block cache.