lucene.net 64bit OutOfMemoryException

Question

我有一个通过64位以下的ASP.NET网站运行的313MB的Lucene索引。当我启动应用程序并在下面的CreateLuceneIndex（）方法中使用IndexReader.Open(directory, true)读入索引时，我看到IIS Express Worker Process膨胀超过4GB然后爆炸 - OutOfMemoryException！

任何人都可以解释为什么以及我需要做些什么才能解决问题？当实际索引大小仅为313MB时，为什么会发生这种情况？

注意：Container是DI容器（Funq）

private void CreateLuceneIndex(Container container)
{
    var directory = CreateDirectory();
    var indexWriter = CreateIndexWriter(container, directory);
    //indexWriter.DeleteAll();

    //var fieldDictionary = CreateIndexFieldDictionary();

    //PopulateLuceneIndex(indexWriter, fieldDictionary);

    indexWriter.Dispose();

    container.Register(new IndexSearcher(IndexReader.Open(directory, true)));
}

private Directory CreateDirectory()
{
    var useAzureBlob = _appSettings.Get("UseAzureBLOBStorage", false);
    var blobStorageEndpoint = _appSettings.Get("blobStorage", string.Empty);

    var directory = useAzureBlob
        ? (Directory)
            new AzureDirectory(CloudStorageAccount.Parse(blobStorageEndpoint), "Catalogue")
            : new MMapDirectory(new DirectoryInfo(Environment.CurrentDirectory));

    return directory;
}

private IndexWriter CreateIndexWriter(Container container, Directory directory)
{
    container.Register<Analyzer>(new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30));
    var analyser = container.TryResolve<Analyzer>();

    var indexWriter = new IndexWriter(directory, analyser, IndexWriter.MaxFieldLength.UNLIMITED);
    indexWriter.SetRAMBufferSizeMB(10.0);

    return indexWriter;
}

Answer 1

我还没有解决原因，但我发现从MMapDirectory更改为FSDirectory可以解决我的问题。