Package org.apache.hadoop.hbase.io.hfile

Class CacheStats

java.lang.Object

org.apache.hadoop.hbase.io.hfile.CacheStats

Direct Known Subclasses:

BucketCacheStats, CombinedBlockCache.CombinedCacheStats

@Private
public class CacheStats
extends Object

Class that implements cache metrics.

Field Summary

Fields

Modifier and Type	Field	Description
private FastLongHistogram	ageAtEviction	Keep running age at eviction time
private final LongAdder	bloomChunkHitCount
private final LongAdder	bloomChunkMissCount
private final LongAdder	dataHitCount
private final LongAdder	dataMissCount	Per Block Type Counts
(package private) static final int	DEFAULT_WINDOW_PERIODS	Sliding window statistics.
private final LongAdder	deleteFamilyBloomHitCount
private final LongAdder	deleteFamilyBloomMissCount
private final LongAdder	evictedBlockCount	The total number of blocks that have been evicted
private final LongAdder	evictionCount	The number of times an eviction has occurred
private final AtomicLong	failedInserts	The total number of blocks that were not inserted.
private final LongAdder	fileInfoHitCount
private final LongAdder	fileInfoMissCount
private final LongAdder	generalBloomMetaHitCount
private final LongAdder	generalBloomMetaMissCount
private final LongAdder	hitCachingCount	The number of getBlock requests that were cache hits, but only from requests that were set to use the block cache.
private final long[]	hitCachingCounts	Caching hit counts for each period in window
private final LongAdder	hitCount	The number of getBlock requests that were cache hits
private final long[]	hitCounts	Hit counts for each period in window
private final LongAdder	intermediateIndexHitCount
private final LongAdder	intermediateIndexMissCount
private long	lastHitCachingCount	Last hit caching count read
private long	lastHitCount	Last hit count read
private long	lastRequestCachingCount	Last request caching count read
private long	lastRequestCount	Last request count read
private final LongAdder	leafIndexHitCount
private final LongAdder	leafIndexMissCount
private final LongAdder	metaHitCount
private final LongAdder	metaMissCount
private final LongAdder	missCachingCount	The number of getBlock requests that were cache misses, but only from requests that were set to use the block cache.
private final LongAdder	missCount	The number of getBlock requests that were cache misses
private final int	numPeriodsInWindow	The number of metrics periods to include in window
private final LongAdder	primaryEvictedBlockCount	The total number of blocks for primary replica that have been evicted
private final LongAdder	primaryHitCount	The number of getBlock requests that were cache hits from primary replica
private final LongAdder	primaryMissCount	The number of getBlock requests for primary replica that were cache misses
private final long[]	requestCachingCounts	Caching access counts for each period in window
private final long[]	requestCounts	Access counts for each period in window
private final LongAdder	rootIndexHitCount
private final LongAdder	rootIndexMissCount
private long	startTime
private final LongAdder	trailerHitCount
private final LongAdder	trailerMissCount
private int	windowIndex	Current window index (next to be updated)

Constructor Summary

Constructors

Constructor	Description
CacheStats(String name)
CacheStats(String name, int numPeriodsInWindow)

Method Summary

Modifier and Type	Method	Description
void	evict()
void	evicted(long t, boolean primary)
double	evictedPerEviction()
long	failInsert()
AgeSnapshot	getAgeAtEvictionSnapshot()
long	getBloomChunkHitCount()
long	getBloomChunkMissCount()
long	getDataHitCount()
long	getDataMissCount()
long	getDeleteFamilyBloomHitCount()
long	getDeleteFamilyBloomMissCount()
long	getEvictedCount()
long	getEvictionCount()
long	getFailedInserts()
long	getFileInfoHitCount()
long	getFileInfoMissCount()
long	getGeneralBloomMetaHitCount()
long	getGeneralBloomMetaMissCount()
long	getHitCachingCount()
double	getHitCachingRatio()
double	getHitCachingRatioPastNPeriods()
long	getHitCount()
double	getHitRatio()
double	getHitRatioPastNPeriods()
long	getIntermediateIndexHitCount()
long	getIntermediateIndexMissCount()
long	getLeafIndexHitCount()
long	getLeafIndexMissCount()
long	getMetaHitCount()
long	getMetaMissCount()
long	getMissCachingCount()
double	getMissCachingRatio()
long	getMissCount()
double	getMissRatio()
long	getPrimaryEvictedCount()
long	getPrimaryHitCount()
long	getPrimaryMissCount()
long	getRequestCachingCount()
long	getRequestCount()
long	getRootIndexHitCount()
long	getRootIndexMissCount()
long	getSumHitCachingCountsPastNPeriods()
long	getSumHitCountsPastNPeriods()
long	getSumRequestCachingCountsPastNPeriods()
long	getSumRequestCountsPastNPeriods()
long	getTrailerHitCount()
long	getTrailerMissCount()
void	hit(boolean caching, boolean primary, BlockType type)
void	miss(boolean caching, boolean primary, BlockType type)
void	rollMetricsPeriod()
private static long	sum(long[] counts)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_WINDOW_PERIODS

static final int DEFAULT_WINDOW_PERIODS

Sliding window statistics. The number of metric periods to include in sliding window hit ratio calculations.

See Also:

• Constant Field Values

hitCount

private final LongAdder hitCount

The number of getBlock requests that were cache hits

primaryHitCount

private final LongAdder primaryHitCount

The number of getBlock requests that were cache hits from primary replica

hitCachingCount

private final LongAdder hitCachingCount

The number of getBlock requests that were cache hits, but only from requests that were set to use the block cache. This is because all reads attempt to read from the block cache even if they will not put new blocks into the block cache. See HBASE-2253 for more information.

missCount

private final LongAdder missCount

The number of getBlock requests that were cache misses

primaryMissCount

private final LongAdder primaryMissCount

The number of getBlock requests for primary replica that were cache misses

missCachingCount

private final LongAdder missCachingCount

The number of getBlock requests that were cache misses, but only from requests that were set to use the block cache.

evictionCount

private final LongAdder evictionCount

The number of times an eviction has occurred

evictedBlockCount

private final LongAdder evictedBlockCount

The total number of blocks that have been evicted

primaryEvictedBlockCount

private final LongAdder primaryEvictedBlockCount

The total number of blocks for primary replica that have been evicted

failedInserts

private final AtomicLong failedInserts

The total number of blocks that were not inserted.

dataMissCount

private final LongAdder dataMissCount

Per Block Type Counts

leafIndexMissCount

private final LongAdder leafIndexMissCount

bloomChunkMissCount

private final LongAdder bloomChunkMissCount

metaMissCount

private final LongAdder metaMissCount

rootIndexMissCount

private final LongAdder rootIndexMissCount

intermediateIndexMissCount

private final LongAdder intermediateIndexMissCount

fileInfoMissCount

private final LongAdder fileInfoMissCount

generalBloomMetaMissCount

private final LongAdder generalBloomMetaMissCount

deleteFamilyBloomMissCount

private final LongAdder deleteFamilyBloomMissCount

trailerMissCount

private final LongAdder trailerMissCount

dataHitCount

private final LongAdder dataHitCount

leafIndexHitCount

private final LongAdder leafIndexHitCount

bloomChunkHitCount

private final LongAdder bloomChunkHitCount

metaHitCount

private final LongAdder metaHitCount

rootIndexHitCount

private final LongAdder rootIndexHitCount

intermediateIndexHitCount

private final LongAdder intermediateIndexHitCount

fileInfoHitCount

private final LongAdder fileInfoHitCount

generalBloomMetaHitCount

private final LongAdder generalBloomMetaHitCount

deleteFamilyBloomHitCount

private final LongAdder deleteFamilyBloomHitCount

trailerHitCount

private final LongAdder trailerHitCount

numPeriodsInWindow

private final int numPeriodsInWindow

The number of metrics periods to include in window

hitCounts

private final long[] hitCounts

Hit counts for each period in window

hitCachingCounts

private final long[] hitCachingCounts

Caching hit counts for each period in window

requestCounts

private final long[] requestCounts

Access counts for each period in window

requestCachingCounts

private final long[] requestCachingCounts

Caching access counts for each period in window

lastHitCount

private long lastHitCount

Last hit count read

lastHitCachingCount

private long lastHitCachingCount

Last hit caching count read

lastRequestCount

private long lastRequestCount

Last request count read

lastRequestCachingCount

private long lastRequestCachingCount

Last request caching count read

windowIndex

private int windowIndex

Current window index (next to be updated)

ageAtEviction

private FastLongHistogram ageAtEviction

Keep running age at eviction time

startTime

private long startTime

Constructor Details

CacheStats

public CacheStats(String name)

CacheStats

public CacheStats(String name,
 int numPeriodsInWindow)

Method Details

toString

public String toString()

Overrides:

toString in class Object

miss

public void miss(boolean caching,
 boolean primary,
 BlockType type)

hit

public void hit(boolean caching,
 boolean primary,
 BlockType type)

evict

public void evict()

evicted

public void evicted(long t,
 boolean primary)

failInsert

public long failInsert()

getDataMissCount

public long getDataMissCount()

getLeafIndexMissCount

public long getLeafIndexMissCount()

getBloomChunkMissCount

public long getBloomChunkMissCount()

getMetaMissCount

public long getMetaMissCount()

getRootIndexMissCount

public long getRootIndexMissCount()

getIntermediateIndexMissCount

public long getIntermediateIndexMissCount()

getFileInfoMissCount

public long getFileInfoMissCount()

getGeneralBloomMetaMissCount

public long getGeneralBloomMetaMissCount()

getDeleteFamilyBloomMissCount

public long getDeleteFamilyBloomMissCount()

getTrailerMissCount

public long getTrailerMissCount()

getDataHitCount

public long getDataHitCount()

getLeafIndexHitCount

public long getLeafIndexHitCount()

getBloomChunkHitCount

public long getBloomChunkHitCount()

getMetaHitCount

public long getMetaHitCount()

getRootIndexHitCount

public long getRootIndexHitCount()

getIntermediateIndexHitCount

public long getIntermediateIndexHitCount()

getFileInfoHitCount

public long getFileInfoHitCount()

getGeneralBloomMetaHitCount

public long getGeneralBloomMetaHitCount()

getDeleteFamilyBloomHitCount

public long getDeleteFamilyBloomHitCount()

getTrailerHitCount

public long getTrailerHitCount()

getRequestCount

public long getRequestCount()

getRequestCachingCount

public long getRequestCachingCount()

getMissCount

public long getMissCount()

getPrimaryMissCount

public long getPrimaryMissCount()

getMissCachingCount

public long getMissCachingCount()

getHitCount

public long getHitCount()

getPrimaryHitCount

public long getPrimaryHitCount()

getHitCachingCount

public long getHitCachingCount()

getEvictionCount

public long getEvictionCount()

getEvictedCount

public long getEvictedCount()

getPrimaryEvictedCount

public long getPrimaryEvictedCount()

getHitRatio

public double getHitRatio()

getHitCachingRatio

public double getHitCachingRatio()

getMissRatio

public double getMissRatio()

getMissCachingRatio

public double getMissCachingRatio()

evictedPerEviction

public double evictedPerEviction()

getFailedInserts

public long getFailedInserts()

rollMetricsPeriod

public void rollMetricsPeriod()

getSumHitCountsPastNPeriods

public long getSumHitCountsPastNPeriods()

getSumRequestCountsPastNPeriods

public long getSumRequestCountsPastNPeriods()

getSumHitCachingCountsPastNPeriods

public long getSumHitCachingCountsPastNPeriods()

getSumRequestCachingCountsPastNPeriods

public long getSumRequestCachingCountsPastNPeriods()

getHitRatioPastNPeriods

public double getHitRatioPastNPeriods()

getHitCachingRatioPastNPeriods

public double getHitCachingRatioPastNPeriods()

getAgeAtEvictionSnapshot

public AgeSnapshot getAgeAtEvictionSnapshot()

sum

private static long sum(long[] counts)