RamUsageUtil

java.lang.Object

org.apache.lucene.codecs.uniformsplit.RamUsageUtil

public class RamUsageUtil extends Object

Utility methods to estimate the RAM usage of objects. It relies on RamUsageEstimator.

Field Summary

Fields

Modifier and Type

Field

Description

private static final long

BYTES_REF_BASE_RAM_USAGE

private static final long

BYTES_REF_BUILDER_BASE_RAM_USAGE

private static final long

HASH_MAP_BASE_RAM_USAGE

private static final long

HASH_MAP_ENTRY_BASE_RAM_USAGE

private static final long

UNMODIFIABLE_ARRAY_LIST_BASE_RAM_USAGE
Constructor Summary

Constructors

Constructor

Description

RamUsageUtil()
Method Summary

Modifier and Type

Method

Description

static long

ramBytesUsed(TermState termState)

static long

ramBytesUsed(BytesRef bytesRef)

static long

ramBytesUsed(BytesRefBuilder bytesRefBuilder)

static long

ramBytesUsedByByteArrayOfLength(int length)

static long

ramBytesUsedByHashMapOfSize(int size)

static long

ramBytesUsedByObjectArrayOfLength(int length)

static long

ramBytesUsedByUnmodifiableArrayListOfSize(int size)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- BYTES_REF_BASE_RAM_USAGE
  
  private static final long BYTES_REF_BASE_RAM_USAGE
- BYTES_REF_BUILDER_BASE_RAM_USAGE
  
  private static final long BYTES_REF_BUILDER_BASE_RAM_USAGE
- HASH_MAP_BASE_RAM_USAGE
  
  private static final long HASH_MAP_BASE_RAM_USAGE
- HASH_MAP_ENTRY_BASE_RAM_USAGE
  
  private static final long HASH_MAP_ENTRY_BASE_RAM_USAGE
- UNMODIFIABLE_ARRAY_LIST_BASE_RAM_USAGE
  
  private static final long UNMODIFIABLE_ARRAY_LIST_BASE_RAM_USAGE
Constructor Details
- RamUsageUtil
  
  public RamUsageUtil()
Method Details
- ramBytesUsed
  
  public static long ramBytesUsed(BytesRef bytesRef)
- ramBytesUsed
  
  public static long ramBytesUsed(BytesRefBuilder bytesRefBuilder)
- ramBytesUsed
  
  public static long ramBytesUsed(TermState termState)
- ramBytesUsedByByteArrayOfLength
  
  public static long ramBytesUsedByByteArrayOfLength(int length)
- ramBytesUsedByHashMapOfSize
  
  public static long ramBytesUsedByHashMapOfSize(int size)
- ramBytesUsedByUnmodifiableArrayListOfSize
  
  public static long ramBytesUsedByUnmodifiableArrayListOfSize(int size)
- ramBytesUsedByObjectArrayOfLength
  
  public static long ramBytesUsedByObjectArrayOfLength(int length)