org.apache.spark.util

Class SizeEstimator

Object

org.apache.spark.util.SizeEstimator

All Implemented Interfaces:

Logging

public class SizeEstimator
extends Object
implements Logging

Estimates the sizes of Java objects (number of bytes of memory they occupy), for use in memory-aware caches.

Based on the following JavaWorld article: http://www.javaworld.com/javaworld/javaqa/2003-12/02-qa-1226-sizeof.html

Constructor Summary

Constructors

Constructor and Description
SizeEstimator()

Method Summary

Methods

Modifier and Type	Method and Description
static long	estimate(Object obj)

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.Logging

initializeIfNecessary, initializeLogging, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

Constructor Detail

SizeEstimator

public SizeEstimator()

Method Detail

estimate

public static long estimate(Object obj)