2017-06-01 10:41 GMT+02:00 Larry Hastings <la...@hastings.org>: > On 06/01/2017 01:19 AM, Antoine Pitrou wrote: > If you'd like to go that way anyway, I would suggest 1MB as a starting > point in 3.7. > > I understand the desire for caution. But I was hoping maybe we could > experiment with 4mb in trunk for a while? We could change it to 1mb--or > even 256k--before beta 1 if we get anxious.
While I fail to explain why in depth, I would prefer to *not* touch the default arena size at this point. We need more data, for example measure the memory usage on different workloads using different arena sizes. It's really hard to tune a memory allocator for *any* use cases. A simple enhancement would be to add an environment variable to change the arena size at Python startup. Example: PYTHONARENASIZE=1M. If you *know* that your application will allocate at least 2 GB, you may even want to try PYTHONARENASIZE=1G which is more likely to use a single large page... Such parameter cannot be used by default: it would make the default Python memory usage insane ;-) Victor _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
