kalyanamdewri opened a new pull request, #55581:
URL: https://github.com/apache/arrow/pull/55581

   Summary:
   - Correct the default Dataset scan batch size to 131,072 rows and 
distinguish it from the Parquet writer's default row group size.
   - Add a runnable example showing that a larger scan batch size does not 
combine Parquet row groups.
   
   Validation:
   - `python -m pytest --doctest-glob='*.rst' docs/source/python/dataset.rst 
-q` — 1 passed with PyArrow 26.0.1
   - `git diff --check` — passed
   
   Was AI used for this PR?
   AI assisted with the documentation patch and draft description. I reviewed 
the diff and ran the checks locally.
   
   GitHub Issue: #40576
   


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