mayya-sharipova commented on a change in pull request #315:
URL: https://github.com/apache/lucene/pull/315#discussion_r721410089
##########
File path:
lucene/core/src/java/org/apache/lucene/codecs/lucene90/Lucene90HnswVectorsReader.java
##########
@@ -301,55 +349,62 @@ public KnnGraphValues getGraphValues(String field) throws
IOException {
throw new IllegalArgumentException("No such field '" + field + "'");
}
FieldEntry entry = fields.get(field);
- if (entry != null && entry.indexDataLength > 0) {
+ if (entry != null && entry.graphIndexLength > 0) {
return getGraphValues(entry);
} else {
return KnnGraphValues.EMPTY;
}
}
private KnnGraphValues getGraphValues(FieldEntry entry) throws IOException {
+ if (entry.ordOffsetsByLevel == null) {
+ synchronized (entry) {
Review comment:
@rmuir Thanks for checking. Good to know that we don't encourage lazy
loading, and I will revert this change from this PR, and avoid doing lazy
loading in the future.
The problem with the current code is that we load all the graph data into
memory in the Reader constructor, why may instantiate this reader many times,
and for some of these times we don't need the graph data (e.g. if we just do
CheckIndex). But we have a plan to address this to use instead off-heap graph
data.
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