```
public class RamUsageUtil
extends java.lang.Object
```
Utility methods to estimate the RAM usage of objects. It relies on RamUsageEstimator.

Fields
Modifier and Type	Field	Description
`private static long`	`BYTES_REF_BASE_RAM_USAGE`
`private static long`	`BYTES_REF_BUILDER_BASE_RAM_USAGE`
`private static long`	`HASH_MAP_BASE_RAM_USAGE`
`private static long`	`HASH_MAP_ENTRY_BASE_RAM_USAGE`
`private static long`	`UNMODIFIABLE_ARRAY_LIST_BASE_RAM_USAGE`

All Methods Static Methods Concrete Methods
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

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

public static long ramBytesUsed(BytesRef bytesRef)

public static long ramBytesUsed(BytesRefBuilder bytesRefBuilder)

public static long ramBytesUsed(TermState termState)

public static long ramBytesUsedByByteArrayOfLength(int length)

public static long ramBytesUsedByHashMapOfSize(int size)

public static long ramBytesUsedByUnmodifiableArrayListOfSize(int size)

public static long ramBytesUsedByObjectArrayOfLength(int length)

Class RamUsageUtil