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

Class PagesWriteThrottle

java.lang.Object

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

All Implemented Interfaces:

PagesWriteThrottlePolicy

public class PagesWriteThrottle
extends Object
implements PagesWriteThrottlePolicy

Throttles threads that generate dirty pages during ongoing checkpoint. Designed to avoid zero dropdowns that can happen if checkpoint buffer is overflowed.

Constructor Summary

Constructors

Constructor and Description
PagesWriteThrottle(PageMemoryImpl pageMemory, CheckpointWriteProgressSupplier cpProgress, CheckpointLockStateChecker stateChecker, boolean throttleOnlyPagesInCheckpoint)

Method Summary

Modifier and Type	Method and Description
void	onBeginCheckpoint() Callback to notify throttling policy checkpoint was started.
void	onFinishCheckpoint() Callback to notify throttling policy checkpoint was finished.
void	onMarkDirty(boolean isPageInCheckpoint) Callback to apply throttling delay.

Methods inherited from class java.lang.Object

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

Constructor Detail

PagesWriteThrottle

public PagesWriteThrottle(PageMemoryImpl pageMemory,
                          CheckpointWriteProgressSupplier cpProgress,
                          CheckpointLockStateChecker stateChecker,
                          boolean throttleOnlyPagesInCheckpoint)

Parameters:

pageMemory - Page memory.

cpProgress - Database manager.

stateChecker - checkpoint lock state checker.

throttleOnlyPagesInCheckpoint - If true, throttle will only protect from checkpoint buffer overflow.

Method Detail

onMarkDirty

public void onMarkDirty(boolean isPageInCheckpoint)

Callback to apply throttling delay.

Specified by:

onMarkDirty in interface PagesWriteThrottlePolicy

Parameters:

isPageInCheckpoint - flag indicating if current page is in scope of current checkpoint.

onBeginCheckpoint

public void onBeginCheckpoint()

Callback to notify throttling policy checkpoint was started.

Specified by:

onBeginCheckpoint in interface PagesWriteThrottlePolicy

onFinishCheckpoint

public void onFinishCheckpoint()

Callback to notify throttling policy checkpoint was finished.

Specified by:

onFinishCheckpoint in interface PagesWriteThrottlePolicy