On Sat, Jun 26, 2021 at 11:59 AM Ram Rachum
Do you think it's worthwhile to add this feature to `ProcessPoolExecutor`?
*restart_workers* certainly seems worth further investigation and
consideration. However, you may also be able to find a workaround using the
*initialzer* argument for ProcessPoolExecutor. A detailed description is
found in the docs for ThreadPoolExecutor:
*initializer* is an optional callable that is called at the start of each
worker thread; *initargs* is a tuple of arguments passed to the
initializer.
Not certain and could be decently involved, but figured it may be a lead
worth sharing. :)
With loving-kindness,
On Sat, Jun 26, 2021 at 11:59 AM Ram Rachum
Hi guys,
I want to have a version of `concurrent.futures.ProcessPoolExecutor` in which every worker process shuts down after each task. I want this because I believe I have a memory leak in my program that I wasn't able to fix. (Possibly it's in C extensions that I use.)
Since I'm going to use a process pool anyway, I'm hoping to sidestep this memory leak by launching every task on a worker process that shuts down after it's done.
A few years back when I was working at Dell, they did something similar. They had a Python server that had a memory leak, and they worked around it by having a process that can be easily restarted, and then they restarted it often.
The plan is that each new work item will run on a fresh process that has no memory leaks from previous work items.
I looked at the `futures/process.py` file to see whether I could subclass `ProcessPoolExecutor` and add this functionality, and boy oh boy this is not easy.
Do you think it's worthwhile to add this feature to `ProcessPoolExecutor`?
Thanks, Ram. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/UNDY7Y... Code of Conduct: http://python.org/psf/codeofconduct/
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