bsddb memory leak on ubuntu

[kcwu]

BPO	3541
Nosy	@jcea, @devdanzin

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2009-05-22.12:17:16.281>
created_at = <Date 2008-08-11.13:06:46.430>
labels = ['extension-modules', 'performance']
title = 'bsddb memory leak on ubuntu'
updated_at = <Date 2009-05-22.12:17:16.231>
user = 'https://bugs.python.org/kcwu'

bugs.python.org fields:

activity = <Date 2009-05-22.12:17:16.231>
actor = 'jcea'
assignee = 'none'
closed = True
closed_date = <Date 2009-05-22.12:17:16.281>
closer = 'jcea'
components = ['Extension Modules']
creation = <Date 2008-08-11.13:06:46.430>
creator = 'kcwu'
dependencies = []
files = []
hgrepos = []
issue_num = 3541
keywords = []
message_count = 6.0
messages = ['71013', '87931', '87934', '88046', '88054', '88193']
nosy_count = 4.0
nosy_names = ['jcea', 'ajaksu2', 'kcwu', 'marcin.bachry']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'test needed'
status = 'closed'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue3541'
versions = ['Python 2.6', 'Python 2.7']

[kcwu]

On ubuntu, python 2.5.2.
The memory usage of following program is increasing infinitly. There may
be something leaking.

However, it only consumes constant memory on windows (python 2.5.2).

import bsddb
d = bsddb.hashopen('a.db', 'c')
d.close()
while True:
    d = bsddb.hashopen('a.db')
    d.close()

[devdanzin]

Confirmed in trunk.

[marcinbachry]

The test program uses constant memory on my machine. Ubuntu 9.04,
libdb4.7.25-6ubuntu1, python 2.7 trunk.

[jcea]

Python 2.5 is in security maintenance mode only.

Please, upgrade to Python 2.6. If you can not upgrade Python, install a
recent bsddb release from http://www.jcea.es/programacion/pybsddb.htm

If you can still reproduce the problem, let me know.

[devdanzin]

I can confirm it in trunk and release26-maint on Ubuntu 8.04.

For trunk:
bsddb.__version__ : '4.7.3'
libdb4.6-dev: 4.6.21-6ubuntu1
_bsddb.version(): (4, 6, 21)
bsddb._bsddb.cvsid: '$Id: _bsddb.c 66568 2008-09-23 18:54:08Z jesus.cea $'

[jcea]

I can *not* reproduce the problem with Python 2.6 (with its stock bsddb
version) and Berkeley DB 4.7.25 (the current one).

I can reproduce the issue if I use Berkeley DB 4.6.21. Seems to be a
(solved) problem in the library.

Berkeley DB 4.7.25 is known to solve a few memory leaks:
http://www.oracle.com/technology/documentation/berkeley-db/db/ref/changelog/4.7.html

I mark the bug as "closed" and "out of date" because it is no something
we can solve and it is already resolved in BDB 4.7.25, published a year ago.

Moreover, any serious usage of Berkeley DB "demands" a recent version of
the library.