com.sleepycat.je.cleaner

Class LocalUtilizationTracker

java.lang.Object

com.sleepycat.je.cleaner.BaseUtilizationTracker

com.sleepycat.je.cleaner.LocalUtilizationTracker

public class LocalUtilizationTracker
extends BaseUtilizationTracker

Accumulates changes to the utilization profile locally in a single thread.

The countNewLogEntry, countObsoleteNode and countObsoleteNodeInexact methods may be called without taking the log write latch. Totals and offset are accumulated locally in this object only, not in DatabaseImpl objects.

When finished with this object, its information should be added to the Environment's UtilizationTracker and DatabaseImpl objects by calling transferToUtilizationTracker under the log write latch. This is done in the Checkpointer, Evictor and INCompressor by calling UtilizationProfile.flushLocalTracker which calls LogManager.transferToUtilizationTracker which calls BaseLocalUtilizationTracker.transferToUtilizationTracker.

Constructor Summary

Constructors

Constructor and Description
LocalUtilizationTracker(EnvironmentImpl env)

Method Summary

Modifier and Type	Method and Description
void	countObsoleteNode(long lsn, LogEntryType type, int size) Counts a node that has become obsolete and tracks the LSN offset, if non-zero, to avoid a lookup during cleaning.
void	countObsoleteNodeInexact(long lsn, LogEntryType type, int size) Counts as countObsoleteNode does, but since the LSN may be inexact, does not track the obsolete LSN offset.

Methods inherited from class com.sleepycat.je.cleaner.BaseUtilizationTracker

countObsoleteDb, getEnvironment, getTrackedFile, getTrackedFiles, isLNType, trackObsoleteInfo, transferToUtilizationTracker

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalUtilizationTracker

public LocalUtilizationTracker(EnvironmentImpl env)

Method Detail

countObsoleteNode

public void countObsoleteNode(long lsn,
                              LogEntryType type,
                              int size)

Counts a node that has become obsolete and tracks the LSN offset, if non-zero, to avoid a lookup during cleaning.

A zero LSN offset is used as a special value when obsolete offset tracking is not desired. [#15365] The file header entry (at offset zero) is never counted as obsolete, it is assumed to be obsolete by the cleaner.

This method should only be called for LNs and INs (i.e, only for nodes). If type is null we assume it is an LN.

countObsoleteNodeInexact

public void countObsoleteNodeInexact(long lsn,
                                     LogEntryType type,
                                     int size)

Counts as countObsoleteNode does, but since the LSN may be inexact, does not track the obsolete LSN offset.

This method should only be called for LNs and INs (i.e, only for nodes). If type is null we assume it is an LN.