org.apache.ignite.internal.processors.cache.database

Class MemoryMetricsImpl

java.lang.Object

org.apache.ignite.internal.processors.cache.database.MemoryMetricsImpl

All Implemented Interfaces:

MemoryMetrics

public class MemoryMetricsImpl
extends Object
implements MemoryMetrics

Constructor Summary

Constructors

Constructor and Description
MemoryMetricsImpl(MemoryPolicyConfiguration memPlcCfg)

Method Summary

Methods

Modifier and Type	Method and Description
void	decrementLargeEntriesPages()
void	disableMetrics()
void	enableMetrics()
float	getAllocationRate() Gets pages allocation rate of a memory region.
float	getEvictionRate() Gets eviction rate of a given memory region.
float	getLargeEntriesPagesPercentage() Gets percentage of pages that are fully occupied by large entries that go beyond page size.
String	getName() A name of a memory region the metrics are collected for.
float	getPagesFillFactor() Gets the percentage of space that is still free and can be filled in.
long	getTotalAllocatedPages() Gets a total number of allocated pages in a memory region.
void	incrementLargeEntriesPages()
void	incrementTotalAllocatedPages() Increments totalAllocatedPages counter.
void	rateTimeInterval(int rateTimeInterval)
void	subIntervals(int subInts) Sets number of subintervals the whole rateTimeInterval will be split into to calculate allocation rate.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryMetricsImpl

public MemoryMetricsImpl(MemoryPolicyConfiguration memPlcCfg)

Parameters:

memPlcCfg - MemoryPolicyConfiguration.

Method Detail

getName

public String getName()

A name of a memory region the metrics are collected for.

Specified by:

getName in interface MemoryMetrics

Returns:

Name of the memory region.

getTotalAllocatedPages

public long getTotalAllocatedPages()

Gets a total number of allocated pages in a memory region.

Specified by:

getTotalAllocatedPages in interface MemoryMetrics

Returns:

Total number of allocated pages.

getAllocationRate

public float getAllocationRate()

Gets pages allocation rate of a memory region.

Specified by:

getAllocationRate in interface MemoryMetrics

Returns:

Number of allocated pages per second.

getEvictionRate

public float getEvictionRate()

Gets eviction rate of a given memory region.

Specified by:

getEvictionRate in interface MemoryMetrics

Returns:

Number of evicted pages per second.

getLargeEntriesPagesPercentage

public float getLargeEntriesPagesPercentage()

Gets percentage of pages that are fully occupied by large entries that go beyond page size. The large entities are split into fragments in a way so that each fragment can fit into a single page.

Specified by:

getLargeEntriesPagesPercentage in interface MemoryMetrics

Returns:

Percentage of pages fully occupied by large entities.

getPagesFillFactor

public float getPagesFillFactor()

Gets the percentage of space that is still free and can be filled in.

Specified by:

getPagesFillFactor in interface MemoryMetrics

Returns:

The percentage of space that is still free and can be filled in.

incrementTotalAllocatedPages

public void incrementTotalAllocatedPages()

Increments totalAllocatedPages counter.

incrementLargeEntriesPages

public void incrementLargeEntriesPages()

decrementLargeEntriesPages

public void decrementLargeEntriesPages()

enableMetrics

public void enableMetrics()

disableMetrics

public void disableMetrics()

rateTimeInterval

public void rateTimeInterval(int rateTimeInterval)

Parameters:

rateTimeInterval - Time interval used to calculate allocation/eviction rate.

subIntervals

public void subIntervals(int subInts)

Sets number of subintervals the whole rateTimeInterval will be split into to calculate allocation rate.

Parameters:

subInts - Number of subintervals.