org.apache.cassandra.metrics

Class CacheMetrics

java.lang.Object

org.apache.cassandra.metrics.CacheMetrics

Direct Known Subclasses:

ChunkCacheMetrics

public class CacheMetrics
extends java.lang.Object

Metrics for ICache.

Field Summary

Fields

Modifier and Type	Field and Description
com.codahale.metrics.Gauge<java.lang.Long>	capacity Cache capacity in bytes
com.codahale.metrics.Gauge<java.lang.Integer>	entries Total number of cache entries
protected MetricNameFactory	factory
com.codahale.metrics.Gauge<java.lang.Double>	fifteenMinuteHitRate 15m hit rate
com.codahale.metrics.Gauge<java.lang.Double>	fiveMinuteHitRate 5m hit rate
com.codahale.metrics.Gauge<java.lang.Double>	hitRate all time cache hit rate
com.codahale.metrics.Meter	hits Total number of cache hits
com.codahale.metrics.Meter	misses Total number of cache misses
com.codahale.metrics.Gauge<java.lang.Double>	oneMinuteHitRate 1m hit rate
com.codahale.metrics.Meter	requests Total number of cache requests
com.codahale.metrics.Gauge<java.lang.Long>	size Total size of cache, in bytes

Constructor Summary

Constructors

Constructor and Description
CacheMetrics(java.lang.String type, CacheSize cache) Create metrics for given cache.

Method Summary

Modifier and Type	Method and Description
void	reset()

Methods inherited from class java.lang.Object

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

Field Detail

capacity

public final com.codahale.metrics.Gauge<java.lang.Long> capacity

Cache capacity in bytes

size

public final com.codahale.metrics.Gauge<java.lang.Long> size

Total size of cache, in bytes

entries

public final com.codahale.metrics.Gauge<java.lang.Integer> entries

Total number of cache entries

hits

public final com.codahale.metrics.Meter hits

Total number of cache hits

misses

public final com.codahale.metrics.Meter misses

Total number of cache misses

requests

public final com.codahale.metrics.Meter requests

Total number of cache requests

hitRate

public final com.codahale.metrics.Gauge<java.lang.Double> hitRate

all time cache hit rate

oneMinuteHitRate

public final com.codahale.metrics.Gauge<java.lang.Double> oneMinuteHitRate

1m hit rate

fiveMinuteHitRate

public final com.codahale.metrics.Gauge<java.lang.Double> fiveMinuteHitRate

5m hit rate

fifteenMinuteHitRate

public final com.codahale.metrics.Gauge<java.lang.Double> fifteenMinuteHitRate

15m hit rate

factory

protected final MetricNameFactory factory

Constructor Detail

CacheMetrics

public CacheMetrics(java.lang.String type,
                    CacheSize cache)

Create metrics for given cache.

Parameters:

type - Type of Cache to identify metrics.

cache - Cache to measure metrics

Method Detail

reset

public void reset()