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https://issues.apache.org/jira/browse/ARROW-2479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17659506#comment-17659506
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Rok Mihevc commented on ARROW-2479:
-----------------------------------
This issue has been migrated to [issue
#18684|https://github.com/apache/arrow/issues/18684] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [C++] Have a global thread pool
> -------------------------------
>
> Key: ARROW-2479
> URL: https://issues.apache.org/jira/browse/ARROW-2479
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++
> Reporter: Antoine Pitrou
> Assignee: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.10.0
>
> Time Spent: 7.5h
> Remaining Estimate: 0h
>
> A few parts of Arrow have started spawning threads to parallelize CPU-bound
> tasks. They do so by launching a hard-coded number of threads, disregarding
> machine configuration or the fact that Arrow itself might be used from
> several threads at once (so hardcoding 8 threads might end up launch N * 8
> threads if the user is calling Arrow from N threads at once...).
> Instead we probably want a global thread pool policy, with a singleton thread
> pool for CPU-bound tasks (using, by default, a number of threads equal to the
> machine's capacity).
> See discussion in [https://github.com/apache/arrow/pull/1893]
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