Re: Nonexistent pid in pg_locks - Mailing list pgsql-bugs

From Tom Lane
Subject Re: Nonexistent pid in pg_locks
Date
Msg-id 8708.1247082127@sss.pgh.pa.us
Whole thread Raw
In response to Re: Nonexistent pid in pg_locks  (Joe Uhl <joeuhl@gmail.com>)
Responses Re: Nonexistent pid in pg_locks  (Joe Uhl <joeuhl@gmail.com>)
List pgsql-bugs
Joe Uhl <joeuhl@gmail.com> writes:
> On Jul 8, 2009, at 3:00 PM, Tom Lane wrote:
>> Hmm.  In any case that shouldn't have led to a lock left hanging.
>> Assuming that it was a regular and not autovacuum, do you know what
>> the exact command would have been?  (In particular, FULL, ANALYZE,
>> etc options)

> They were VACUUM VERBOSE ANALYZE.  Specifically run with "/usr/bin/
> vacuumdb -v --analyze $DB_NAME" in the cron job each night.

We had bugs long ago (8.0 or before) where SIGTERM'ing a backend could
result in lock entries not getting cleaned up, but that's all fixed now
AFAIK.  I tried some simple experiments with SIGTERM'ing a VACUUM in
8.3.x and couldn't reproduce a problem.  So there must have been some
other contributing factor here, but without any idea what it was, it's
hard to investigate further :-(

            regards, tom lane

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