org.apache.arrow.memory

クラス RootAllocator

java.lang.Object

org.apache.arrow.memory.BaseAllocator

org.apache.arrow.memory.RootAllocator

すべての実装されたインタフェース:

AutoCloseable, BufferAllocator

public class RootAllocator
extends BaseAllocator

The root allocator for using direct memory inside a Drillbit. Supports creating a tree of descendant child allocators.

ネストされたクラスのサマリー

クラスから継承されたネストされたクラス/インタフェース org.apache.arrow.memory.BaseAllocator

BaseAllocator.Reservation, BaseAllocator.Verbosity

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
protected org.apache.arrow.memory.Accountant	parent The parent allocator
protected long	reservation The amount of memory reserved for this allocator.

クラスから継承されたフィールド org.apache.arrow.memory.BaseAllocator

DEBUG, DEBUG_ALLOCATOR, DEBUG_LOG_LENGTH

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
RootAllocator(AllocationListener listener, long limit)
RootAllocator(long limit)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
long	getAllocatedMemory() Return the current amount of allocated memory that this Accountant is managing accounting for.
long	getHeadroom()
long	getLimit() Return the current limit of this Accountant.
long	getPeakMemoryAllocation() The peak memory allocated by this Accountant.
boolean	isOverLimit()
void	releaseBytes(long size)
void	setLimit(long newLimit) Set the maximum amount of memory that can be allocated in the this Accountant before failing an allocation.
void	verify() Verify the accounting state of the allocation system.

クラスから継承されたメソッド org.apache.arrow.memory.BaseAllocator

assertOpen, buffer, buffer, close, getAsByteBufAllocator, getEmpty, getName, indent, isDebug, newChildAllocator, newChildAllocator, newReservation, nextPowerOfTwo, nextPowerOfTwo, toString, toVerboseString

クラスから継承されたメソッド java.lang.Object

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

インタフェースから継承されたメソッド org.apache.arrow.memory.BufferAllocator

getAllocatedMemory, getHeadroom, getLimit, getPeakMemoryAllocation, isOverLimit, setLimit

フィールドの詳細

parent

protected final org.apache.arrow.memory.Accountant parent

The parent allocator

reservation

protected final long reservation

The amount of memory reserved for this allocator. Releases below this amount of memory will not be returned to the parent Accountant until this Accountant is closed.

コンストラクタの詳細

RootAllocator

public RootAllocator(long limit)

RootAllocator

public RootAllocator(AllocationListener listener,
                     long limit)

メソッドの詳細

verify

public void verify()

Verify the accounting state of the allocation system.

releaseBytes

public void releaseBytes(long size)

isOverLimit

public boolean isOverLimit()

getLimit

public long getLimit()

Return the current limit of this Accountant.

戻り値:

Limit in bytes.

setLimit

public void setLimit(long newLimit)

Set the maximum amount of memory that can be allocated in the this Accountant before failing an allocation.

パラメータ:

newLimit - The limit in bytes.

getAllocatedMemory

public long getAllocatedMemory()

Return the current amount of allocated memory that this Accountant is managing accounting for. Note this does not include reservation memory that hasn't been allocated.

戻り値:

Currently allocate memory in bytes.

getPeakMemoryAllocation

public long getPeakMemoryAllocation()

The peak memory allocated by this Accountant.

戻り値:

The peak allocated memory in bytes.

getHeadroom

public long getHeadroom()