[issue19817] tracemalloc add a memory limit feature

[STINNER Victor]

Changes by STINNER Victor :


--
resolution:  -> out of date
status: open -> closed

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[issue19817] tracemalloc add a memory limit feature

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:


--
nosy: +Arfrever

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[issue19817] tracemalloc add a memory limit feature

[Roundup Robot]

Roundup Robot added the comment:

New changeset 45442f2a2494 by Victor Stinner in branch 'default':
Issue #19817: Fix print_exception(), clear the exception on error
http://hg.python.org/cpython/rev/45442f2a2494

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nosy: +python-dev

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[issue19817] tracemalloc add a memory limit feature

[STINNER Victor]

STINNER Victor added the comment:

This feature cannot be used without a reliable PyErr_NoMemory(): I add issue 
#19835 as a dependency.

--
dependencies: +Add a MemoryError singleton to fix an unlimited loop when the 
memory is exhausted

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[issue19817] tracemalloc add a memory limit feature

[STINNER Victor]

STINNER Victor added the comment:

Updated patch.

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Added file: http://bugs.python.org/file32958/tracemalloc_memory_limit-2.patch

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[issue19817] tracemalloc add a memory limit feature

[STINNER Victor]

STINNER Victor added the comment:

test_limit.patch: Patch to test the memory_limit on the Python test suite. 
tracemalloc_memory_limit-2.patch and unittest_leak.patch (of issue #19880) are 
required to test it.

--
Added file: http://bugs.python.org/file32959/test_limit.patch

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[issue19817] tracemalloc add a memory limit feature

[STINNER Victor]

New submission from STINNER Victor:

It would be nice to add a memory_limit feature to the tracemalloc to make 
memory allocation fails if it would make the traced memory greater than the 
limit.

See also the pyfailmalloc project which is similar but different:
https://bitbucket.org/haypo/pyfailmalloc

pyfailmalloc doesn't count allocated bytes, it schedules an error in N 
allocations where N is a random number. And pyfailmalloc only schedules one 
error, whereas I propose to make all memory allocations fails until the limit 
is respected.

So if you only 0 bytes free (according to the limit), all memory allocations 
fail until some bytes are freed.

Python currently behaves badly under very low memory condition.

See also the issue #19437.

--
files: tracemalloc_memory_limit.patch
keywords: patch
messages: 204605
nosy: haypo, neologix
priority: normal
severity: normal
status: open
title: tracemalloc add a memory limit feature
versions: Python 3.5
Added file: http://bugs.python.org/file32873/tracemalloc_memory_limit.patch

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