Most definitely not the number of unique elements in each segment. My 32 document sample index (built from the default example docs data) has the following:
entry#0: 'StandardDirectoryReader(segments_b:29 _8(4.2.1):C32)'=>'manu_exact',class org.apache.lucene.index.SortedDocValues,0.5=>org.apache.lucene.search.FieldCacheImpl$SortedDocValuesImpl#1778857102 There is no chance for there to be 1.8 billion unique elements in that index. On May 20, 2013, at 1:20 PM, Erick Erickson <erickerick...@gmail.com> wrote: > Not sure, never had to worry about what they are...... > > On Mon, May 20, 2013 at 12:28 PM, J Mohamed Zahoor <zah...@indix.com> wrote: >> >> What is the number at the end? >> is it the no of unique elements in each segment? >> >> ./zahoor >> >> >> On 20-May-2013, at 7:37 PM, Erick Erickson <erickerick...@gmail.com> wrote: >> >>> Because the same field is split amongst a number of segments. If you >>> look in the index directory, you should see files like _3fgm.* and >>> _3ffm.*. Each such group represents one segment. The number of >>> segments changes with merging etc. >>> >>> Best >>> Erick >>> >>> On Mon, May 20, 2013 at 6:43 AM, J Mohamed Zahoor <zah...@indix.com> wrote: >>>> Hi >>>> >>>> Why is that lucene field cache has multiple entries for the same field >>>> S_24. >>>> It is a dynamic field. >>>> >>>> >>>> 'SegmentCoreReader(owner=_3fgm(4.2.1):C7681)'=>'S_24',double,org.apache.lucene.search.FieldCache.NUMERIC_UTILS_DOUBLE_PARSER=>org.apache.lucene.search.FieldCacheImpl$DoublesFromArray#1174240382 >>>> >>>> 'SegmentCoreReader(owner=_3ffm(4.2.1):C1596758)'=>'S_24',double,org.apache.lucene.search.FieldCache.NUMERIC_UTILS_DOUBLE_PARSER=>org.apache.lucene.search.FieldCacheImpl$DoublesFromArray#83384344 >>>> >>>> 'SegmentCoreReader(owner=_3fgh(4.2.1):C2301)'=>'S_24',double,org.apache.lucene.search.FieldCache.NUMERIC_UTILS_DOUBLE_PARSER=>org.apache.lucene.search.FieldCacheImpl$DoublesFromArray#1281331764 >>>> >>>> >>>> Also, the number at the end.. does it specified the no of entries in that >>>> cache bucket? >>>> >>>> ./zahoor >>
