Package io.trino.memory

Class MemoryPool

java.lang.Object

io.trino.memory.MemoryPool

public class MemoryPool
extends Object

Constructor Summary

Constructors

Constructor	Description
MemoryPool(io.airlift.units.DataSize size)

Method Summary

Modifier and Type	Method	Description
void	addListener(MemoryPoolListener listener)
void	free(TaskId taskId, String allocationTag, long bytes)
void	freeRevocable(long bytes)
void	freeRevocable(TaskId taskId, long bytes)
long	getFreeBytes()	Returns the number of free bytes.
MemoryPoolInfo	getInfo()
long	getMaxBytes()
Map<QueryId,Long>	getQueryMemoryReservations()
Map<QueryId,Long>	getQueryRevocableMemoryReservations()
long	getReservedBytes()
long	getReservedRevocableBytes()
Map<QueryId,Map<String,Long>>	getTaggedMemoryAllocations()
Map<TaskId,Long>	getTaskMemoryReservations()
Map<TaskId,Long>	getTaskRevocableMemoryReservations()
void	removeListener(MemoryPoolListener listener)
com.google.common.util.concurrent.ListenableFuture<Void>	reserve(TaskId taskId, String allocationTag, long bytes)	Reserves the given number of bytes.
com.google.common.util.concurrent.ListenableFuture<Void>	reserveRevocable(TaskId taskId, long bytes)
String	toString()
boolean	tryReserve(TaskId taskId, String allocationTag, long bytes)	Try to reserve the given number of bytes.
boolean	tryReserveRevocable(long bytes)

Methods inherited from class java.lang.Object

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

Constructor Details

MemoryPool

public MemoryPool(io.airlift.units.DataSize size)

Method Details

getInfo

public MemoryPoolInfo getInfo()

addListener

public void addListener(MemoryPoolListener listener)

removeListener

public void removeListener(MemoryPoolListener listener)

reserve

public com.google.common.util.concurrent.ListenableFuture<Void> reserve(TaskId taskId,
 String allocationTag,
 long bytes)

Reserves the given number of bytes. Caller should wait on the returned future, before allocating more memory.

reserveRevocable

public com.google.common.util.concurrent.ListenableFuture<Void> reserveRevocable(TaskId taskId,
 long bytes)

tryReserve

public boolean tryReserve(TaskId taskId,
 String allocationTag,
 long bytes)

Try to reserve the given number of bytes. Return value indicates whether the caller may use the requested memory.

tryReserveRevocable

public boolean tryReserveRevocable(long bytes)

free

public void free(TaskId taskId,
 String allocationTag,
 long bytes)

freeRevocable

public void freeRevocable(TaskId taskId,
 long bytes)

freeRevocable

public void freeRevocable(long bytes)

getFreeBytes

public long getFreeBytes()

Returns the number of free bytes. This value may be negative, which indicates that the pool is over-committed.

getMaxBytes

public long getMaxBytes()

getReservedBytes

public long getReservedBytes()

getReservedRevocableBytes

public long getReservedRevocableBytes()

toString

public String toString()

Overrides:

toString in class Object

getQueryMemoryReservations

public Map<QueryId,Long> getQueryMemoryReservations()

getTaggedMemoryAllocations

public Map<QueryId,Map<String,Long>> getTaggedMemoryAllocations()

getQueryRevocableMemoryReservations

public Map<QueryId,Long> getQueryRevocableMemoryReservations()

getTaskMemoryReservations

public Map<TaskId,Long> getTaskMemoryReservations()

getTaskRevocableMemoryReservations

public Map<TaskId,Long> getTaskRevocableMemoryReservations()