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| author | Brian Quinlan <brian@sweetapp.com> | 2019-05-08 18:04:53 (GMT) |
|---|---|---|
| committer | Steve Dower <steve.dower@python.org> | 2019-05-08 18:04:53 (GMT) |
| commit | 39889864c09741909da4ec489459d0197ea8f1fc (patch) | |
| tree | 08f7745e5ca5554a14f6b583a4ee8d345d3fe4b7 /Doc/library/concurrent.futures.rst | |
| parent | b9b08cd948de97d756a199b60becce8397a8c882 (diff) | |
| download | cpython-39889864c09741909da4ec489459d0197ea8f1fc.zip cpython-39889864c09741909da4ec489459d0197ea8f1fc.tar.gz cpython-39889864c09741909da4ec489459d0197ea8f1fc.tar.bz2 | |
bpo-26903: Limit ProcessPoolExecutor to 61 workers on Windows (GH-13132)
Co-Authored-By: brianquinlan <brian@sweetapp.com>
Diffstat (limited to 'Doc/library/concurrent.futures.rst')
| -rw-r--r-- | Doc/library/concurrent.futures.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst index 8d6b1e8..ffc29d7 100644 --- a/Doc/library/concurrent.futures.rst +++ b/Doc/library/concurrent.futures.rst @@ -216,6 +216,10 @@ to a :class:`ProcessPoolExecutor` will result in deadlock. given, it will default to the number of processors on the machine. If *max_workers* is lower or equal to ``0``, then a :exc:`ValueError` will be raised. + On Windows, *max_workers* must be equal or lower than ``61``. If it is not + then :exc:`ValueError` will be raised. If *max_workers* is ``None``, then + the default chosen will be at most ``61``, even if more processors are + available. *mp_context* can be a multiprocessing context or None. It will be used to launch the workers. If *mp_context* is ``None`` or not given, the default multiprocessing context is used. |