[ARROW-2569] [C++] Improve thread pool size heuristic

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18933
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 10/May/18 17:17
• Updated: 11/Jan/23 07:21
• Resolved: 13/May/18 15:18

Description

We currently use the number of available HW threads as the default thread pool size for CPU-bound tasks. We should also examine well-known environment variables such as OMP_NUM_THREADS. Some discussion here: https://bugs.python.org/issue32986

Issue Links

• links to: GitHub Pull Request #2026