view test/test_locking.py @ 7668:5b41018617f2

fix: out of memory error when importing under postgresql If you try importing more than 20k items under postgresql you can run out of memory: psycopg2.errors.OutOfMemory: out of shared memory HINT: You might need to increase max_locks_per_transaction. Tuning memory may help, it's unknown at this point. This checkin forces a commit to the postgres database after 10,000 rows have been added. This clears out the savepoints for each row and starts a new transaction. back_postgresql.py: Implement commit mechanism in checkpoint_data(). Add two class level attributes for tracking the number of savepoints and the limit when the commit should happen. roundup_admin.py: implement pragma and dynamically create the config item RDBMS_SAVEPOINT_LIMIT used by checkpoint_data. Also fixed formatting of descriptions when using pragma list in verbose mode. admin_guide.txt, upgrading.txt: Document change and use of pragma savepoint_limit in roundup-admin for changing the default of 10,000. test/db_test_base.py: add some more asserts. In existing testAdminImportExport, set the savepoint limit to 5 to test setting method and so that the commit code will be run by existing tests. This provides coverage, but does not actually test that the commit is done every 5 savepoints 8-(. The verification of every 5 savepoints was done manually using a pdb breakpoint just before the commit. acknowledgements.txt: Added 2.4.0 section mentioning Norbert as he has done a ton of testing with much larger datasets than I can test with.
author John Rouillard <rouilj@ieee.org>
date Thu, 19 Oct 2023 16:11:25 -0400
parents 35ea9b1efc14
children fed0f839c260
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# Copyright (c) 2002 ekit.com Inc (http://www.ekit-inc.com/)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
#   The above copyright notice and this permission notice shall be included in
#   all copies or substantial portions of the Software.
#
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import os, unittest, tempfile

from roundup.backends.locking import acquire_lock, release_lock

class LockingTest(unittest.TestCase):
    def setUp(self):
        self.path = tempfile.mktemp()
        open(self.path, 'w').write('hi\n')

    # XXX test disabled because it simply doesn't work on many platforms
    # (Solaris and Irix are known to fail, but Linux works)
    def xtest_basics(self):
        f = acquire_lock(self.path)
        try:
            acquire_lock(self.path, block=0)
        except:
            pass
        else:
            raise AssertionError('no exception')
        release_lock(f)
        f = acquire_lock(self.path)
        release_lock(f)

    def tearDown(self):
        os.remove(self.path)

# vim: set filetype=python ts=4 sw=4 et si

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