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https://issues.apache.org/jira/browse/ARROW-15732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-15732:
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Labels: pull-request-available (was: )
> [C++] Do not use any CPU threads in execution plan when use_threads is false
> ----------------------------------------------------------------------------
>
> Key: ARROW-15732
> URL: https://issues.apache.org/jira/browse/ARROW-15732
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Weston Pace
> Assignee: Weston Pace
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently, scan operations that supply use_threads=false will use 1 CPU
> thread, the calling thread, and some # of I/O threads. We should remove that
> CPU thread from being used.
> It is being used at the moment because we need something to transfer work
> onto when asynchronous I/O tasks complete. We can fix this by allowing a
> serial executor to run an async generator (creating an iterator). This will
> also allow us to change the execution plan so that it always expects an
> executor to be present which should simplify the logic.
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