jpountz commented on a change in pull request #610: LUCENE-8671: Load FST
off-heap if reader is not opened from an index writer
URL: https://github.com/apache/lucene-solr/pull/610#discussion_r267016239
##########
File path:
lucene/core/src/java/org/apache/lucene/codecs/blocktree/FieldReader.java
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@@ -91,7 +92,8 @@
clone.seek(indexStartFP);
// Initialize FST offheap if index is MMapDirectory and
// docCount != sumDocFreq implying field is not primary key
- if (clone instanceof ByteBufferIndexInput && this.docCount !=
this.sumDocFreq) {
+ isFSTOffHeap = clone instanceof ByteBufferIndexInput && ((this.docCount
!= this.sumDocFreq) || openedFromWriter == false);
Review comment:
I guess some users need fast lookups on read-only indices, but this proposal
looks like a good default to me.
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