CacheStats (Apache HBase 1.1.7 API)

java.lang.Object
- org.apache.hadoop.hbase.io.hfile.CacheStats

Direct Known Subclasses:

BucketCacheStats, CombinedBlockCache.CombinedCacheStats
```
@InterfaceAudience.Private
public class CacheStats
extends Object
```
Class that implements cache metrics.

Constructor Summary

Constructors
Constructor and Description

CacheStats(String name)

CacheStats(String name, int numPeriodsInWindow)

Constructors
Constructor and Description
`CacheStats(String name)`
`CacheStats(String name, int numPeriodsInWindow)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`evict()`
`void`	`evicted(long t)`
`double`	`evictedPerEviction()`
`AgeSnapshot`	`getAgeAtEvictionSnapshot()`
`long`	`getEvictedCount()`
`long`	`getEvictionCount()`
`long`	`getHitCachingCount()`
`double`	`getHitCachingRatio()`
`double`	`getHitCachingRatioPastNPeriods()`
`long`	`getHitCount()`
`double`	`getHitRatio()`
`double`	`getHitRatioPastNPeriods()`
`long`	`getMissCachingCount()`
`double`	`getMissCachingRatio()`
`long`	`getMissCount()`
`double`	`getMissRatio()`
`long`	`getRequestCachingCount()`
`long`	`getRequestCount()`
`long`	`getSumHitCachingCountsPastNPeriods()`
`long`	`getSumHitCountsPastNPeriods()`
`long`	`getSumRequestCachingCountsPastNPeriods()`
`long`	`getSumRequestCountsPastNPeriods()`
`void`	`hit(boolean caching)`
`void`	`miss(boolean caching)`
`void`	`rollMetricsPeriod()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CacheStats
```
public CacheStats(String name)
```

CacheStats

public CacheStats(String name,
          int numPeriodsInWindow)

Method Detail

toString
```
public String toString()
```
Overrides:

toString in class Object

miss
```
public void miss(boolean caching)
```

hit
```
public void hit(boolean caching)
```

evict
```
public void evict()
```

evicted
```
public void evicted(long t)
```

getRequestCount
```
public long getRequestCount()
```

getRequestCachingCount
```
public long getRequestCachingCount()
```

getMissCount
```
public long getMissCount()
```

getMissCachingCount
```
public long getMissCachingCount()
```

getHitCount
```
public long getHitCount()
```

getHitCachingCount
```
public long getHitCachingCount()
```

getEvictionCount
```
public long getEvictionCount()
```

getEvictedCount
```
public long getEvictedCount()
```

getHitRatio
```
public double getHitRatio()
```

getHitCachingRatio
```
public double getHitCachingRatio()
```

getMissRatio
```
public double getMissRatio()
```

getMissCachingRatio
```
public double getMissCachingRatio()
```

evictedPerEviction
```
public double evictedPerEviction()
```

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()

Class CacheStats

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CacheStats

CacheStats

Method Detail

toString

miss

hit

evict

evicted

getRequestCount

getRequestCachingCount

getMissCount

getMissCachingCount

getHitCount

getHitCachingCount

getEvictionCount

getEvictedCount

getHitRatio

getHitCachingRatio

getMissRatio

getMissCachingRatio

evictedPerEviction

rollMetricsPeriod

getSumHitCountsPastNPeriods

getSumRequestCountsPastNPeriods

getSumHitCachingCountsPastNPeriods

getSumRequestCachingCountsPastNPeriods

getHitRatioPastNPeriods

getHitCachingRatioPastNPeriods

getAgeAtEvictionSnapshot