Python multiprocessing's Pool process limit

Question

In using the Pool object from the multiprocessing module, is the number of processes limited by the number of CPU cores? E.g. if I have 4 cores, even if I create a Pool with

Answer 1

While there is no limit you can set, if you are looking to understand a convenient number to use for CPU bound processes (which I suspect you are looking for here), you can run the following:

>>> import multiprocessing
>>> multiprocessing.cpu_count()
1

Some good notes on limitations (especially in linux) are noted in the answer here: