yli1994 commented on issue #14726:
URL: https://github.com/apache/arrow/issues/14726#issuecomment-1334690052

   > If you want to reduce memory usage when reading a file, you should not 
read it as an entire table, but as a sequence of batches. See here: 
https://arrow.apache.org/docs/python/parquet.html#finer-grained-reading-and-writing
   
   And LMDB (which uses 'memory map', not sure difference between LMDB mmap and 
arrow mmap) can read directly from disk, thanks a lot for your answering!


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