org.apache.ignite.internal.processors.cache.persistence.pagemem

Class SegmentedLruPageList

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.pagemem.SegmentedLruPageList

public class SegmentedLruPageList
extends Object

Pages Segmented-LRU (SLRU) list implementation.

See Also:

PageReplacementMode.SEGMENTED_LRU

Constructor Summary

Constructors

Constructor and Description
SegmentedLruPageList(int totalPagesCnt, long memPtr)

Method Summary

Modifier and Type	Method and Description
void	addToTail(int pageIdx, boolean protectedPage) Add page to the tail of protected or probationary LRU list.
void	moveToTail(int pageIdx) Move page to the tail of protected LRU list.
int	poll() Remove page from the head of LRU list.
void	remove(int pageIdx) Remove page from LRU list by page index.
static long	requiredMemory(int pagesCnt) Memory required to service pagesCnt pages.

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentedLruPageList

public SegmentedLruPageList(int totalPagesCnt,
                            long memPtr)

Parameters:

totalPagesCnt - Total pages count.

memPtr - Pointer to memory region.

Method Detail

poll

public int poll()

Remove page from the head of LRU list.

Returns:

Page index or -1 if list is empty.

remove

public void remove(int pageIdx)

Remove page from LRU list by page index.

Parameters:

pageIdx - Page index.

addToTail

public void addToTail(int pageIdx,
                      boolean protectedPage)

Add page to the tail of protected or probationary LRU list.

Parameters:

pageIdx - Page index.

protectedPage - Protected page flag.

moveToTail

public void moveToTail(int pageIdx)

Move page to the tail of protected LRU list.

Parameters:

pageIdx - Page index.

requiredMemory

public static long requiredMemory(int pagesCnt)

Memory required to service pagesCnt pages.

Parameters:

pagesCnt - Pages count.