Class MemoryPressureController.JvmMemoryPressureController

java.lang.Object

io.fluxzero.common.caching.MemoryPressureController.JvmMemoryPressureController

All Implemented Interfaces:

MemoryPressureController

Enclosing interface:

MemoryPressureController

public static class MemoryPressureController.JvmMemoryPressureController
extends Object
implements MemoryPressureController

Nested Class Summary

Nested classes/interfaces inherited from interface MemoryPressureController

MemoryPressureController.JvmMemoryPressureController

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_GC_CACHE_UTILIZATION_PERCENT
static final int	DEFAULT_GC_TIME_THRESHOLD_PERCENT
static final int	DEFAULT_HEAP_USAGE_THRESHOLD_PERCENT
static final long	DEFAULT_MAX_TRIM_WEIGHT
static final int	DEFAULT_TRIM_RATIO_PERCENT

Fields inherited from interface MemoryPressureController

MEMORY_PRESSURE_GC_CACHE_UTILIZATION_PERCENT_PROPERTY, MEMORY_PRESSURE_GC_TIME_THRESHOLD_PERCENT_PROPERTY, MEMORY_PRESSURE_HEAP_THRESHOLD_PERCENT_PROPERTY, MEMORY_PRESSURE_MAX_TRIM_WEIGHT_PROPERTY, MEMORY_PRESSURE_TRIM_RATIO_PERCENT_PROPERTY, NONE

Method Summary

Modifier and Type	Method	Description
long	maxTrimWeight()	Returns the maximum cache weight to remove in one pressure-driven trim.
boolean	shouldEvict(long currentWeight, long maxWeight)	Returns whether memory pressure warrants eviction given the current cache weight and configured maximum weight.
int	trimRatioPercent()	Returns the percentage of cache weight targeted by a pressure-driven trim.

Methods inherited from class Object

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

Field Details

DEFAULT_HEAP_USAGE_THRESHOLD_PERCENT

public static final int DEFAULT_HEAP_USAGE_THRESHOLD_PERCENT

See Also:

• Constant Field Values

DEFAULT_GC_TIME_THRESHOLD_PERCENT

public static final int DEFAULT_GC_TIME_THRESHOLD_PERCENT

See Also:

• Constant Field Values

DEFAULT_GC_CACHE_UTILIZATION_PERCENT

public static final int DEFAULT_GC_CACHE_UTILIZATION_PERCENT

See Also:

• Constant Field Values

DEFAULT_TRIM_RATIO_PERCENT

public static final int DEFAULT_TRIM_RATIO_PERCENT

See Also:

• Constant Field Values

DEFAULT_MAX_TRIM_WEIGHT

public static final long DEFAULT_MAX_TRIM_WEIGHT

See Also:

• Constant Field Values

Method Details

shouldEvict

public boolean shouldEvict(long currentWeight,
 long maxWeight)

Description copied from interface: MemoryPressureController

Returns whether memory pressure warrants eviction given the current cache weight and configured maximum weight.

Specified by:

shouldEvict in interface MemoryPressureController

trimRatioPercent

public int trimRatioPercent()

Description copied from interface: MemoryPressureController

Returns the percentage of cache weight targeted by a pressure-driven trim.

Specified by:

trimRatioPercent in interface MemoryPressureController

maxTrimWeight

public long maxTrimWeight()

Description copied from interface: MemoryPressureController

Returns the maximum cache weight to remove in one pressure-driven trim.

Specified by:

maxTrimWeight in interface MemoryPressureController