Examples of org.apache.lucene.facet.taxonomy.CachedOrdinalsReader

org.apache.lucene.facet.taxonomy.CachedOrdinalsReader

A per-segment cache of documents' facet ordinals. Every {@link CachedOrds} holds the ordinals in a raw {@code int[]}, and therefore consumes as much RAM as the total number of ordinals found in the segment, but saves the CPU cost of decoding ordinals during facet counting.

NOTE: every {@link CachedOrds} is limited to 2.1Btotal ordinals. If that is a limitation for you then consider limiting the segment size to fewer documents, or use an alternative cache which pages through the category ordinals.

NOTE: when using this cache, it is advised to use a {@link DocValuesFormat} that does not cache the data inmemory, at least for the category lists fields, or otherwise you'll be doing double-caching.

NOTE: create one instance of this and re-use it for all facet implementations (the cache is per-instance, not static).

    if (random().nextBoolean()) {
      facets = new FastTaxonomyFacetCounts(indexFieldName, taxoReader, config, c);
    } else {
      OrdinalsReader ordsReader = new DocValuesOrdinalsReader(indexFieldName);
      if (random().nextBoolean()) {
        ordsReader = new CachedOrdinalsReader(ordsReader);
      }
      facets = new TaxonomyFacetCounts(ordsReader, taxoReader, config, c);
    }


    return facets;

    if (random().nextBoolean()) {
      facets = new FastTaxonomyFacetCounts(indexFieldName, taxoReader, config, c);
    } else {
      OrdinalsReader ordsReader = new DocValuesOrdinalsReader(indexFieldName);
      if (random().nextBoolean()) {
        ordsReader = new CachedOrdinalsReader(ordsReader);
      }
      facets = new TaxonomyFacetCounts(ordsReader, taxoReader, config, c);
    }


    return facets;

Examples of org.apache.lucene.facet.taxonomy.CachedOrdinalsReader

Related Classes of org.apache.lucene.facet.taxonomy.CachedOrdinalsReader