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

Class QueryMemoryManager

java.lang.Object

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

All Implemented Interfaces:

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

public class QueryMemoryManager
extends Object
implements org.apache.ignite.internal.processors.query.h2.H2MemoryTracker, org.apache.ignite.internal.processors.query.h2.ManagedGroupByDataFactory

Query memory manager.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DFLT_MEMORY_RESERVATION_BLOCK_SIZE Default memory reservation block size.
static String	DISK_SPILL_DIR Spill directory path.

Constructor Summary

Constructors

Constructor and Description
QueryMemoryManager(GridKernalContext ctx) Constructor.

Method Summary

Modifier and Type	Method and Description
void	cleanSpillDirectory() Cleans spill directory.
void	close()
boolean	closed()
org.apache.ignite.internal.processors.query.h2.H2MemoryTracker	createChildTracker()
<T> ExternalResultData<T>	createExternalData(org.gridgain.internal.h2.engine.Session ses, boolean useHashIdx, long initSize, Class<T> cls) Creates external data (offload file wrapper).
GroupedExternalResult	createGroupedExternalResult(org.gridgain.internal.h2.engine.Session ses, int size)
org.gridgain.internal.h2.result.ResultExternal	createPlainExternalResult(org.gridgain.internal.h2.engine.Session ses)
GridQueryMemoryMetricProvider	createQueryMemoryTracker(long maxQryMemory) Query memory tracker factory method.
org.gridgain.internal.h2.result.ResultExternal	createSortedExternalResult(org.gridgain.internal.h2.engine.Session ses, boolean distinct, int[] distinctIndexes, int visibleColCnt, org.gridgain.internal.h2.result.SortOrder sort, int rowCnt)
long	freeMemory()
long	getGlobalQuota()
String	getGlobalQuotaInOriginalNotation()
long	getQueryQuota()
String	getQueryQuotaStrinInOriginalNotation()
long	globalQuota()
void	incrementFilesCreated()
boolean	isOffloadingEnabled()
IgniteLogger	log()
long	memoryLimit()
org.gridgain.internal.h2.command.dml.GroupByData	newManagedGroupByData(org.gridgain.internal.h2.engine.Session ses, ArrayList<org.gridgain.internal.h2.expression.Expression> expressions, boolean isGrpQry, int[] grpIdx)
void	onChildClosed(org.apache.ignite.internal.processors.query.h2.H2MemoryTracker child)
boolean	onQuotaExceeded(long size) Action when quota is exceeded.
void	release(long size)
boolean	reserve(long size)
long	reserved()
void	setGlobalQuota(String newGlobalQuota) Sets new global query quota.
void	setOffloadingEnabled(boolean offloadingEnabled) Sets offloading enabled flag.
void	setQueryQuota(String newQryQuota) Sets new per-query quota.
void	spill(long size)
long	totalWrittenOnDisk()
void	unspill(long size)
long	writtenOnDisk()

Methods inherited from class java.lang.Object

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

Field Detail

DISK_SPILL_DIR

public static final String DISK_SPILL_DIR

Spill directory path. Spill directory is used for the disk offloading of intermediate results of the heavy queries.

See Also:

Constant Field Values

DFLT_MEMORY_RESERVATION_BLOCK_SIZE

public static final long DFLT_MEMORY_RESERVATION_BLOCK_SIZE

Default memory reservation block size.

See Also:

Constant Field Values

Constructor Detail

QueryMemoryManager

public QueryMemoryManager(GridKernalContext ctx)

Constructor.

Parameters:

ctx - Kernal context.

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

createQueryMemoryTracker

public GridQueryMemoryMetricProvider createQueryMemoryTracker(long maxQryMemory)

Query memory tracker factory method. Note: If 'maxQueryMemory' is zero, then qryQuota will be used.

Parameters:

maxQryMemory - Query memory limit in bytes.

Returns:

Query memory tracker.

onQuotaExceeded

public boolean onQuotaExceeded(long size)

Action when quota is exceeded.

Returns:

false if it is needed to offload data.

setGlobalQuota

public void setGlobalQuota(String newGlobalQuota)

Sets new global query quota.

Parameters:

newGlobalQuota - New global query quota.

getGlobalQuota

public long getGlobalQuota()

Returns:

Current global query quota.

getGlobalQuotaInOriginalNotation

public String getGlobalQuotaInOriginalNotation()

setQueryQuota

public void setQueryQuota(String newQryQuota)

Sets new per-query quota.

Parameters:

newQryQuota - New per-query quota.

getQueryQuota

public long getQueryQuota()

Returns:

Current query quota.

getQueryQuotaStrinInOriginalNotation

public String getQueryQuotaStrinInOriginalNotation()

setOffloadingEnabled

public void setOffloadingEnabled(boolean offloadingEnabled)

Sets offloading enabled flag.

Parameters:

offloadingEnabled - Offloading enabled flag.

isOffloadingEnabled

public boolean isOffloadingEnabled()

Returns:

Flag whether offloading is enabled.

reserved

public long reserved()

Specified by:

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

Returns:

Bytes reserved by all queries.

memoryLimit

public long memoryLimit()

freeMemory

public long freeMemory()

Returns:

Memory in bytes currently available for SQL queries on the node.

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

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

writtenOnDisk

public long writtenOnDisk()

Specified by:

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

totalWrittenOnDisk

public long totalWrittenOnDisk()

Specified by:

totalWrittenOnDisk 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

closed

public boolean closed()

Specified by:

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

globalQuota

public long globalQuota()

Returns:

Global quota.

log

public IgniteLogger log()

cleanSpillDirectory

public void cleanSpillDirectory()

Cleans spill directory. Spill directory is used for disk offloading of the intermediate results of heavy queries.

newManagedGroupByData

public org.gridgain.internal.h2.command.dml.GroupByData newManagedGroupByData(org.gridgain.internal.h2.engine.Session ses,
                                                                              ArrayList<org.gridgain.internal.h2.expression.Expression> expressions,
                                                                              boolean isGrpQry,
                                                                              int[] grpIdx)

Specified by:

newManagedGroupByData in interface org.apache.ignite.internal.processors.query.h2.ManagedGroupByDataFactory

createPlainExternalResult

public org.gridgain.internal.h2.result.ResultExternal createPlainExternalResult(org.gridgain.internal.h2.engine.Session ses)

Parameters:

ses - Session.

Returns:

Plain external result.

createSortedExternalResult

public org.gridgain.internal.h2.result.ResultExternal createSortedExternalResult(org.gridgain.internal.h2.engine.Session ses,
                                                                                 boolean distinct,
                                                                                 int[] distinctIndexes,
                                                                                 int visibleColCnt,
                                                                                 org.gridgain.internal.h2.result.SortOrder sort,
                                                                                 int rowCnt)

Parameters:

ses - Session.

distinct - Distinct flag.

distinctIndexes - Distinct indexes.

visibleColCnt - Visible columns count.

sort - Sort order.

rowCnt - Row count.

Returns:

Sorted external result.

createGroupedExternalResult

public GroupedExternalResult createGroupedExternalResult(org.gridgain.internal.h2.engine.Session ses,
                                                         int size)

Parameters:

ses - Session.

size - Size;

Returns:

Grouped result;

createExternalData

public <T> ExternalResultData<T> createExternalData(org.gridgain.internal.h2.engine.Session ses,
                                                    boolean useHashIdx,
                                                    long initSize,
                                                    Class<T> cls)

Creates external data (offload file wrapper).

Type Parameters:

T - Type of stored values.

Parameters:

ses - Session.

useHashIdx - Flag whether to use hash index.

initSize - Initial size.

cls - Class of stored values.

Returns:

Created external data (offload file wrapper).