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

Class ClockPageReplacementFlags

java.lang.Object

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

public class ClockPageReplacementFlags
extends Object

Clock page replacement algorithm implementation.

See Also:

PageReplacementMode.CLOCK

Method Summary

Modifier and Type	Method and Description
void	clearFlag(int pageIdx) Clear page hit flag.
int	poll() Find page to replace.
static long	requiredMemory(int pagesCnt) Memory required to service pagesCnt pages.
void	setFlag(int pageIdx) Set page hit flag.

Methods inherited from class java.lang.Object

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

Method Detail

poll

public int poll()

Find page to replace.

Returns:

Page index to replace.

clearFlag

public void clearFlag(int pageIdx)

Clear page hit flag.

Parameters:

pageIdx - Page index.

setFlag

public void setFlag(int pageIdx)

Set page hit flag.

Parameters:

pageIdx - Page index.

requiredMemory

public static long requiredMemory(int pagesCnt)

Memory required to service pagesCnt pages.

Parameters:

pagesCnt - Pages count.