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Diffstat (limited to 'Doc/library/concurrent.futures.rst')
| -rw-r--r-- | Doc/library/concurrent.futures.rst | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst index 9592808..99703ff 100644 --- a/Doc/library/concurrent.futures.rst +++ b/Doc/library/concurrent.futures.rst @@ -254,8 +254,11 @@ to a :class:`ProcessPoolExecutor` will result in deadlock. *max_tasks_per_child* is an optional argument that specifies the maximum number of tasks a single process can execute before it will exit and be - replaced with a fresh worker process. The default *max_tasks_per_child* is - ``None`` which means worker processes will live as long as the pool. + replaced with a fresh worker process. By default *max_tasks_per_child* is + ``None`` which means worker processes will live as long as the pool. When + a max is specified, the "spawn" multiprocessing start method will be used by + default in absense of a *mp_context* parameter. This feature is incompatible + with the "fork" start method. .. versionchanged:: 3.3 When one of the worker processes terminates abruptly, a |