luyuncheng commented on PR #11987:
URL: https://github.com/apache/lucene/pull/11987#issuecomment-1333932432

   > thanks for running. somehow i think bulk merge didnt get disabled. without 
bulk merge optimization, indexing time should be significantly higher, the 
benchmark should be very very slow.
   
   @rmuir  I am also curious about it. 
   BUT i use __arthas__ vmtools to see BULK_MERGE_ENABLED is __false__
   
![image](https://user-images.githubusercontent.com/12760367/205089684-cd61c66f-0918-4ab8-9fe7-e63be6d70fd7.png)
   
   and i manually modified 
lucene/core/src/java/org/apache/lucene/codecs/lucene90/compressing/Lucene90CompressingStoredFieldsWriter.java#BULK_MERGE_ENABLED
 as __false__
   
   when enableBulkMerge=false -Xmx256m
   it shows almost the same:
   
   |                     | Baseline  | Candidate  |
   | :---                |  :----:   |    ---:    |
   | indexing_time_msec  |           |            |
   | BEST_SPEED          | 366735.00 | 368407.00  |
   | BEST_COMPRESSION    | 849980.00 | 852214.00  |
   | retrieved_time_msec |           |            |
   | BEST_SPEED          |  256.10   |  278.06    | 
   | BEST_COMPRESSION    | 2584.96   | 2632.69    | 
   
   AND my runStoredFieldsBenchmark `geonames.txt` dataset is about 1.5GB with 
12489745 lines allCountries data.


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