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https://issues.apache.org/jira/browse/PARQUET-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gang Wu resolved PARQUET-2316.
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Resolution: Fixed
Issue resolved by pull request 36192
https://github.com/apache/arrow/pull/36192
> Allow partial prebuffer in parquet FileReader
> ---------------------------------------------
>
> Key: PARQUET-2316
> URL: https://issues.apache.org/jira/browse/PARQUET-2316
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-cpp
> Reporter: Jinpeng Zhou
> Assignee: Jinpeng Zhou
> Priority: Minor
> Labels: pull-request-available
> Fix For: cpp-13.0.0
>
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> The current FileReader can only work in one of the two modes, coalescing
> (when Prebuffer is called) and non-coalescing (when Prefufer is not called),
> due to the if statement
> [here|https://github.com/apache/arrow/blob/main/cpp/src/parquet/file_reader.cc#L203]
> Since Prebuffer is basically caching all specified column chunks, it would
> raise concerns on memory usage for systems with tight memory budget. In such
> scenarios, one may want to Prebuffer some small chunks while being able to
> read the rest chunks using BufferedInputStream.
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