com.orientechnologies.orient.core.storage.impl.local.statistic

Class OSessionStoragePerformanceStatistic.WritCacheCountersHolder

java.lang.Object

com.orientechnologies.orient.core.storage.impl.local.statistic.OSessionStoragePerformanceStatistic.WritCacheCountersHolder

All Implemented Interfaces:

OSessionStoragePerformanceStatistic.CountersHolder<OSessionStoragePerformanceStatistic.WritCacheCountersHolder>

Enclosing class:

OSessionStoragePerformanceStatistic

public static class OSessionStoragePerformanceStatistic.WritCacheCountersHolder
extends Object
implements OSessionStoragePerformanceStatistic.CountersHolder<OSessionStoragePerformanceStatistic.WritCacheCountersHolder>

Contains write cache performance characteristics

Constructor Summary

Constructors

Constructor and Description
WritCacheCountersHolder()

Method Summary

Modifier and Type	Method and Description
void	clean() Resets all performance characteristics to default values.
long	getFlushOperationsTime()
long	getFuzzyCheckpointTime()
long	getPagesPerFlush()
void	pushData(OSessionStoragePerformanceStatistic.WritCacheCountersHolder holder) Accumulates data in current and passed in containers and push data back to passed in container.
ODocument	toDocument() Serializes performance data as values of fields of returned document.

Methods inherited from class java.lang.Object

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

Constructor Detail

WritCacheCountersHolder

public WritCacheCountersHolder()

Method Detail

clean

public void clean()

Description copied from interface: OSessionStoragePerformanceStatistic.CountersHolder

Resets all performance characteristics to default values.

Specified by:

clean in interface OSessionStoragePerformanceStatistic.CountersHolder<OSessionStoragePerformanceStatistic.WritCacheCountersHolder>

pushData

public void pushData(OSessionStoragePerformanceStatistic.WritCacheCountersHolder holder)

Description copied from interface: OSessionStoragePerformanceStatistic.CountersHolder

Accumulates data in current and passed in containers and push data back to passed in container.

Specified by:

pushData in interface OSessionStoragePerformanceStatistic.CountersHolder<OSessionStoragePerformanceStatistic.WritCacheCountersHolder>

getPagesPerFlush

public long getPagesPerFlush()

Returns:

Average amount of pages which are flushed during "page flush" operation of write cache or -1 if value is undefined

getFlushOperationsTime

public long getFlushOperationsTime()

Returns:

Average amount of time which is spent on each "page flush" operation of write cache or -1 if value is undefined.

getFuzzyCheckpointTime

public long getFuzzyCheckpointTime()

Returns:

Average amount of time which is spent on "fuzzy checkpoint" operation or -1 if value if undefined.

toDocument

public ODocument toDocument()

Description copied from interface: OSessionStoragePerformanceStatistic.CountersHolder

Serializes performance data as values of fields of returned document.

Specified by:

toDocument in interface OSessionStoragePerformanceStatistic.CountersHolder<OSessionStoragePerformanceStatistic.WritCacheCountersHolder>

Returns:

Document filled with performance data