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Posted to github@arrow.apache.org by "mapleFU (via GitHub)" <gi...@apache.org> on 2023/05/05 02:49:47 UTC

[GitHub] [arrow] mapleFU commented on issue #35393: High (resident) memory usage when fetching Parquet metadata/schema

mapleFU commented on issue #35393:
URL: https://github.com/apache/arrow/issues/35393#issuecomment-1535631065

   Hi, `pq.read_schema` will call `Dataset::read_schema`, which will:
   
   ```
   ParquetFileFormat::GetReaderAsync
   ParquetFileFormat::Inspect
   ```
   
   I guess one of the step consume lot of memory, maybe using jemalloc to profile can help


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