mzabaluev opened a new issue, #9719:
URL: https://github.com/apache/arrow-rs/issues/9719

   In parquet, the `estimated_memory_size` method of `DictEncoder` should 
estimate the actual usage of allocated memory, but instead it uses the data 
member counting the encoded size of dictionary data, and ignores the hash table 
memory usage added by the `Interner` member.


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