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
