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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2019-05-28 20:12:30 -0700 |
|---|---|---|
| committer | Ned Deily <nad@python.org> | 2019-05-28 23:12:30 -0400 |
| commit | 8ea0fd85bc67438f679491fae29dfe0a3961900a (patch) | |
| tree | 04842787f563045fe57c61d45a5a9c15fc3e4eb8 /Doc | |
| parent | 0eb69990c85b6c82c677d5a43e3df28836ae845e (diff) | |
| download | cpython-git-8ea0fd85bc67438f679491fae29dfe0a3961900a.tar.gz | |
bpo-26903: Limit ProcessPoolExecutor to 61 workers on Windows (GH-13132) (GH-13643)
Co-Authored-By: brianquinlan <brian@sweetapp.com>
(cherry picked from commit 39889864c09741909da4ec489459d0197ea8f1fc)
Co-authored-by: Brian Quinlan <brian@sweetapp.com>
Diffstat (limited to 'Doc')
| -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 a57491543b..24d684a012 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. |