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https://issues.apache.org/jira/browse/ARROW-3660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou reassigned ARROW-3660:
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Assignee: Dimitri Vorona
> [C++] Don't unnecessarily lock MemoryMappedFile for resizing in readonly files
> ------------------------------------------------------------------------------
>
> Key: ARROW-3660
> URL: https://issues.apache.org/jira/browse/ARROW-3660
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Affects Versions: 0.11.0
> Reporter: Dimitri Vorona
> Assignee: Dimitri Vorona
> Priority: Minor
> Labels: pull-request-available
> Fix For: 0.12.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We lock the resize_lock_ on every read, even though it's not possible to
> resize read-only files.
>
> This also inlines the ResizeMap method into Resize.
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