Package org.apache.drill.exec.memory

Class RootAllocator

java.lang.Object

org.apache.drill.exec.memory.Accountant

org.apache.drill.exec.memory.BaseAllocator

org.apache.drill.exec.memory.RootAllocator

All Implemented Interfaces:

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.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.memory.BaseAllocator

BaseAllocator.Reservation, BaseAllocator.Verbosity

Nested classes/interfaces inherited from class org.apache.drill.exec.memory.Accountant

Accountant.AllocationOutcome

Field Summary

Fields inherited from class org.apache.drill.exec.memory.BaseAllocator

DEBUG, DEBUG_ALLOCATOR, DEBUG_LOG_LENGTH

Fields inherited from class org.apache.drill.exec.memory.Accountant

ALLOW_LENIENCY, ALLOW_LENIENT_ALLOCATION, GRACE_MARGIN, MAX_GRACE, parent, reservation

Constructor Summary

Constructors

Constructor	Description
RootAllocator(long limit)

Method Summary

Modifier and Type	Method	Description
void	verify()	Verify the accounting state of the allocation system.

Methods inherited from class org.apache.drill.exec.memory.BaseAllocator

assertOpen, buffer, buffer, close, getAsByteBufAllocator, getEmpty, getIOBuffer, getName, indent, isDebug, longNextPowerOfTwo, newChildAllocator, newReservation, nextPowerOfTwo, read, read, toString, toVerboseString, write, write

Methods inherited from class org.apache.drill.exec.memory.Accountant

forceLenient, getAllocatedMemory, getLimit, getPeakMemoryAllocation, isOverLimit, releaseBytes, setLenient, setLimit

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.memory.BufferAllocator

getAllocatedMemory, getLimit, getPeakMemoryAllocation, isOverLimit, setLenient, setLimit

Constructor Details

RootAllocator

public RootAllocator(long limit)

Method Details

verify

public void verify()

Verify the accounting state of the allocation system.