increase percentage to .2

Author: iverase

server/src/main/java/org/elasticsearch/index/codec/vectors/DefaultIVFVectorsReader.java

@@ -41,7 +41,7 @@
 public class DefaultIVFVectorsReader extends IVFVectorsReader implements OffHeapStats {
 
     // The percentage of centroids that are scored to keep recall
-    public static final double CENTROID_SAMPLING_PERCENTAGE = 0.15;
+    public static final double CENTROID_SAMPLING_PERCENTAGE = 0.2;
 
     public DefaultIVFVectorsReader(SegmentReadState state, FlatVectorsReader rawVectorsReader) throws IOException {
         super(state, rawVectorsReader);