org.elasticsearch.index.fielddata.plain

インタフェース AbstractIndexFieldData.PerValueEstimator

既知の実装クラスのリスト:

NonEstimatingEstimator, PackedArrayIndexFieldData.PackedArrayEstimator, PagedBytesIndexFieldData.PagedBytesEstimator, ParentChildIndexFieldData.ParentChildEstimator

含まれているクラス:

AbstractIndexFieldData<FD extends AtomicFieldData>

public static interface AbstractIndexFieldData.PerValueEstimator

A PerValueEstimator is a sub-class that can be used to estimate the memory overhead for loading the data. Each field data implementation should implement its own PerValueEstimator if it intends to take advantage of the MemoryCircuitBreaker.

Note that the .beforeLoad(...) and .afterLoad(...) methods must be manually called.

メソッドのサマリー

修飾子とタイプ	メソッドと説明
void	afterLoad(org.apache.lucene.index.TermsEnum termsEnum, long actualUsed) Possibly adjust a circuit breaker after field data has been loaded, now that the actual amount of memory used by the field data is known
org.apache.lucene.index.TermsEnum	beforeLoad(org.apache.lucene.index.Terms terms) Execute any pre-loading estimations for the terms.
long	bytesPerValue(org.apache.lucene.util.BytesRef term)

メソッドの詳細

bytesPerValue

long bytesPerValue(org.apache.lucene.util.BytesRef term)

戻り値:

the number of bytes for the given term

beforeLoad

org.apache.lucene.index.TermsEnum beforeLoad(org.apache.lucene.index.Terms terms)
                                      throws IOException

Execute any pre-loading estimations for the terms. May also optionally wrap a TermsEnum in a RamAccountingTermsEnum which will estimate the memory on a per-term basis.

パラメータ:

terms - terms to be estimated

戻り値:

A TermsEnum for the given terms

例外:

IOException

afterLoad

void afterLoad(org.apache.lucene.index.TermsEnum termsEnum,
               long actualUsed)

Possibly adjust a circuit breaker after field data has been loaded, now that the actual amount of memory used by the field data is known

パラメータ:

termsEnum - terms that were loaded

actualUsed - actual field data memory usage