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org.apache.spark.util

SizeEstimator

object SizeEstimator extends Logging

:: DeveloperApi :: 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: https://www.infoworld.com/article/2077408/sizeof-for-java.html

Annotations
@DeveloperApi()
Source
SizeEstimator.scala
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Logging, AnyRef, Any
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  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    protected[lang]
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    @throws( ... ) @native() @IntrinsicCandidate()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def estimate(obj: AnyRef): Long

    Estimate the number of bytes that the given object takes up on the JVM heap.

    Estimate the number of bytes that the given object takes up on the JVM heap. The estimate includes space taken up by objects referenced by the given object, their references, and so on and so forth.

    This is useful for determining the amount of heap space a broadcast variable will occupy on each executor or the amount of space each object will take when caching objects in deserialized form. This is not the same as the serialized size of the object, which will typically be much smaller.

  9. final def getClass(): Class[_]
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    @native() @IntrinsicCandidate()
  10. def hashCode(): Int
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    @native() @IntrinsicCandidate()
  11. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
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    Logging
  12. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
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    Logging
  13. final def isInstanceOf[T0]: Boolean
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  14. def isTraceEnabled(): Boolean
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    protected
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    Logging
  15. def log: Logger
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    protected
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    Logging
  16. def logDebug(msg: ⇒ String, throwable: Throwable): Unit
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    protected
    Definition Classes
    Logging
  17. def logDebug(msg: ⇒ String): Unit
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    protected
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    Logging
  18. def logError(msg: ⇒ String, throwable: Throwable): Unit
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    protected
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    Logging
  19. def logError(msg: ⇒ String): Unit
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    protected
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    Logging
  20. def logInfo(msg: ⇒ String, throwable: Throwable): Unit
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    protected
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    Logging
  21. def logInfo(msg: ⇒ String): Unit
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    Logging
  22. def logName: String
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  23. def logTrace(msg: ⇒ String, throwable: Throwable): Unit
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  24. def logTrace(msg: ⇒ String): Unit
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    protected
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  25. def logWarning(msg: ⇒ String, throwable: Throwable): Unit
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  26. def logWarning(msg: ⇒ String): Unit
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    protected
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    Logging
  27. final def ne(arg0: AnyRef): Boolean
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  28. final def notify(): Unit
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    @native() @IntrinsicCandidate()
  29. final def notifyAll(): Unit
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    @native() @IntrinsicCandidate()
  30. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  31. def toString(): String
    Definition Classes
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  32. final def wait(arg0: Long, arg1: Int): Unit
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    @throws( ... )
  33. final def wait(arg0: Long): Unit
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    @throws( ... ) @native()
  34. final def wait(): Unit
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    @throws( ... )

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
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    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

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