On Tue, May 12, 2009 at 14:40, Alex Hunsaker <bada...@gmail.com> wrote: > Hrm on second thought I think your right. They only get the lock > until the permission check, and I have a hard time seeing how someone > can take real advantage of that. The owner that is trying to lock > table should get the lock almost immediately even if there are say a > few hundred non-owner clients trying to lock it.
FWIW i just tested this with ~100 clients doing begin; ALTER TABLE test_lock ADD COLUMN commit; here is the timing. Is there some other concern that im not seeing? (pre 100 clients) => LOCK table test_lock; LOCK TABLE Time: 1.955 ms (now with 100 non-owner clients trying to do ALTER TABLE) => LOCK TABLE test_lock; LOCK TABLE Time: 71.746 ms *shrugs* -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
