org.apache.ignite.internal.processors.query.h2

Class QueryMemoryTracker

java.lang.Object

org.apache.ignite.internal.processors.query.h2.QueryMemoryTracker

All Implemented Interfaces:

AutoCloseable, GridQueryMemoryMetricProvider, org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

public class QueryMemoryTracker
extends Object
implements org.apache.ignite.internal.processors.query.h2.H2MemoryTracker, GridQueryMemoryMetricProvider

Query memory tracker. Track query memory usage and throws an exception if query tries to allocate memory over limit.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	QueryMemoryTracker.TrackerWasClosedException Exception thrown when try to track memory with closed tracker.

Constructor Summary

Constructors

Constructor and Description
QueryMemoryTracker(org.apache.ignite.internal.processors.query.h2.H2MemoryTracker parent, long quota, long blockSize, boolean offloadingEnabled) Constructor.

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	closed()
org.apache.ignite.internal.processors.query.h2.H2MemoryTracker	createChildTracker()
void	incrementFilesCreated()
boolean	isOffloadingEnabled()
long	maxReserved()
long	maxWrittenOnDisk()
void	onChildClosed(org.apache.ignite.internal.processors.query.h2.H2MemoryTracker child)
void	release(long size)
boolean	reserve(long size)
long	reserved()
void	spill(long size)
String	toString()
long	totalWrittenOnDisk()
void	unspill(long size)
long	writtenOnDisk()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryMemoryTracker

public QueryMemoryTracker(org.apache.ignite.internal.processors.query.h2.H2MemoryTracker parent,
                          long quota,
                          long blockSize,
                          boolean offloadingEnabled)

Constructor.

Parameters:

parent - Parent memory tracker.

quota - Query memory limit in bytes.

blockSize - Reservation block size.

offloadingEnabled - Flag whether to fail when memory limit is exceeded.

Method Detail

reserve

public boolean reserve(long size)

Specified by:

reserve in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

release

public void release(long size)

Specified by:

release in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

reserved

public long reserved()

Specified by:

reserved in interface GridQueryMemoryMetricProvider

Specified by:

reserved in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

maxReserved

public long maxReserved()

Specified by:

maxReserved in interface GridQueryMemoryMetricProvider

writtenOnDisk

public long writtenOnDisk()

Specified by:

writtenOnDisk in interface GridQueryMemoryMetricProvider

Specified by:

writtenOnDisk in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

maxWrittenOnDisk

public long maxWrittenOnDisk()

Specified by:

maxWrittenOnDisk in interface GridQueryMemoryMetricProvider

totalWrittenOnDisk

public long totalWrittenOnDisk()

Specified by:

totalWrittenOnDisk in interface GridQueryMemoryMetricProvider

Specified by:

totalWrittenOnDisk in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

isOffloadingEnabled

public boolean isOffloadingEnabled()

Returns:

Offloading enabled flag.

spill

public void spill(long size)

Specified by:

spill in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

unspill

public void unspill(long size)

Specified by:

unspill in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

closed

public boolean closed()

Specified by:

closed in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

Returns:

true if closed, false otherwise.

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

incrementFilesCreated

public void incrementFilesCreated()

Specified by:

incrementFilesCreated in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

createChildTracker

public org.apache.ignite.internal.processors.query.h2.H2MemoryTracker createChildTracker()

Specified by:

createChildTracker in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

onChildClosed

public void onChildClosed(org.apache.ignite.internal.processors.query.h2.H2MemoryTracker child)

Specified by:

onChildClosed in interface org.apache.ignite.internal.processors.query.h2.H2MemoryTracker

toString

public String toString()

Overrides:

toString in class Object