org.apache.cassandra.utils.memory

Class MemtablePool

java.lang.Object

org.apache.cassandra.utils.memory.MemtablePool

Direct Known Subclasses:

HeapPool, NativePool, SlabPool

public abstract class MemtablePool
extends java.lang.Object

Represents an amount of memory used for a given purpose, that can be allocated to specific tasks through child MemtableAllocator objects.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	MemtablePool.SubPool Note the difference between acquire() and allocate(); allocate() makes more resources available to all owners, and acquire() makes shared resources unavailable but still recorded.

Field Summary

Fields

Modifier and Type	Field and Description
com.codahale.metrics.Timer	blockedOnAllocating
MemtablePool.SubPool	offHeap
MemtablePool.SubPool	onHeap

Method Summary

Modifier and Type	Method and Description
abstract boolean	needToCopyOnHeap()
abstract MemtableAllocator	newAllocator()

Methods inherited from class java.lang.Object

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

Field Detail

onHeap

public final MemtablePool.SubPool onHeap

offHeap

public final MemtablePool.SubPool offHeap

blockedOnAllocating

public final com.codahale.metrics.Timer blockedOnAllocating

Method Detail

needToCopyOnHeap

public abstract boolean needToCopyOnHeap()

newAllocator

public abstract MemtableAllocator newAllocator()