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

["Neville Dipale (Jira)" <ji...@apache.org>]

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

Neville Dipale resolved ARROW-11279.
------------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Issue resolved by pull request 9222
[https://github.com/apache/arrow/pull/9222]

> [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
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>   Original Estimate: 0.25h
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> 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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