org.apache.ignite.internal.pagemem

Interface PageMemory

All Superinterfaces:

PageIdAllocator, PageSupport

All Known Subinterfaces:

PageMemoryEx

All Known Implementing Classes:

PageMemoryImpl, PageMemoryNoStoreImpl

public interface PageMemory
extends PageIdAllocator, PageSupport

Field Summary

Fields inherited from interface org.apache.ignite.internal.pagemem.PageIdAllocator

FLAG_AUX, FLAG_DATA, FLAG_IDX, INDEX_PARTITION, MAX_PARTITION_ID, META_PAGE_ID

Method Summary

Modifier and Type	Method and Description
int	checkpointBufferPagesCount() Number of pages used in checkpoint buffer.
long	loadedPages()
DataRegionMetricsImpl	metrics() Metrics of the data region this memory is associated with.
ByteBuffer	pageBuffer(long pageAddr)
int	pageSize()
int	realPageSize(int grpId)
void	start() Start page memory.
void	stop(boolean deallocate) Stop page memory.
int	systemPageSize()

Methods inherited from interface org.apache.ignite.internal.pagemem.PageIdAllocator

allocatePage, freePage

Methods inherited from interface org.apache.ignite.internal.pagemem.PageSupport

acquirePage, acquirePage, isDirty, readLock, readLockForce, readUnlock, releasePage, tryWriteLock, writeLock, writeUnlock

Method Detail

start

void start()
    throws IgniteException

Start page memory.

Throws:

IgniteException

stop

void stop(boolean deallocate)
   throws IgniteException

Stop page memory.

Parameters:

deallocate - True to deallocate memory, false to allow memory reuse on subsequent start()

Throws:

IgniteException

pageSize

int pageSize()

Returns:

Page size in bytes.

realPageSize

int realPageSize(int grpId)

Parameters:

grpId - Group id.

Returns:

Page size without encryption overhead.

systemPageSize

int systemPageSize()

Returns:

Page size with system overhead, in bytes.

pageBuffer

ByteBuffer pageBuffer(long pageAddr)

Parameters:

pageAddr - Page address.

Returns:

Page byte buffer.

loadedPages

long loadedPages()

Returns:

Total number of loaded pages in memory.

checkpointBufferPagesCount

int checkpointBufferPagesCount()

Number of pages used in checkpoint buffer.

metrics

DataRegionMetricsImpl metrics()

Metrics of the data region this memory is associated with.