Package com.sleepycat.db

Class StatsConfig

java.lang.Object

com.sleepycat.db.StatsConfig

public class StatsConfig
extends java.lang.Object

Specifies the attributes of a statistics retrieval operation.

Field Summary

Fields

Modifier and Type	Field	Description
static StatsConfig	DEFAULT

Constructor Summary

Constructors

Constructor	Description
StatsConfig()	An instance created using the default constructor is initialized with the system's default settings.

Method Summary

Modifier and Type	Method	Description
boolean	getClear()	Return if the statistics operation is configured to reset statistics after they are returned.
boolean	getFast()	Return if the statistics operation is configured to return only the values which do not require expensive actions.
void	setClear(boolean clear)	Configure the statistics operation to reset statistics after they are returned.
void	setFast(boolean fast)	Configure the statistics operation to return only the values which do not incur some performance penalty.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT

public static final StatsConfig DEFAULT

Constructor Detail

StatsConfig

public StatsConfig()

An instance created using the default constructor is initialized with the system's default settings.

Method Detail

setClear

public void setClear(boolean clear)

Configure the statistics operation to reset statistics after they are returned. The default value is false.

Parameters:

clear - If set to true, configure the statistics operation to reset statistics after they are returned.

getClear

public boolean getClear()

Return if the statistics operation is configured to reset statistics after they are returned.

Returns:

If the statistics operation is configured to reset statistics after they are returned.

setFast

public void setFast(boolean fast)

Configure the statistics operation to return only the values which do not incur some performance penalty.

The default value is false.

For example, skip stats that require a traversal of the database or in-memory tree, or which lock down the lock table for a period of time.

Among other things, this flag makes it possible for applications to request key and record counts without incurring the performance penalty of traversing the entire database. If the underlying database is of type Recno, or of type Btree and the database was configured to support retrieval by record number, the count of keys will be exact. Otherwise, the count of keys will be the value saved the last time the database was traversed, or 0 if no count of keys has ever been made. If the underlying database is of type Recno, the count of data items will be exact, otherwise, the count of data items will be the value saved the last time the database was traversed, or 0 if no count of data items has ever been done.

Parameters:

fast - If set to true, configure the statistics operation to return only the values which do not incur some performance penalty.

getFast

public boolean getFast()

Return if the statistics operation is configured to return only the values which do not require expensive actions.

Returns:

If the statistics operation is configured to return only the values which do not require expensive actions.