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Posted to jira@arrow.apache.org by "R J (Jira)" <ji...@apache.org> on 2021/01/17 00:46:00 UTC

[jira] [Updated] (ARROW-11279) [Rust][Parquet] ArrowWriter Definition Levels Memory Usage

     [ https://issues.apache.org/jira/browse/ARROW-11279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

R J updated ARROW-11279:
------------------------
    Summary: [Rust][Parquet] ArrowWriter Definition Levels Memory Usage  (was: [Rust][Parquet])

> [Rust][Parquet] ArrowWriter Definition Levels Memory Usage
> ----------------------------------------------------------
>
>                 Key: ARROW-11279
>                 URL: https://issues.apache.org/jira/browse/ARROW-11279
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Rust
>            Reporter: R J
>            Priority: Minor
>   Original Estimate: 0.25h
>  Remaining Estimate: 0.25h
>
> In the rust implementation of an Arrow RecordBatch writer to parquet (3.0.0-SNAPSHOT), the ArrowWriter::write call potentially allocates more memory than required.
> For a RecordBatch with m rows and n columns, ArrowWriter::write allocates m*n definition levels, leading to m times the required memory usage.



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