On 10/01/2019 8:33 pm, Thomas Munro wrote:
> On Wed, Oct 2, 2019 at 4:49 AM Larry Rosenman <ler@lerctr.org> wrote:
>> On 10/01/2019 10:46 am, Tom Lane wrote:
>> > Larry Rosenman <ler@lerctr.org> writes:
>> >> My Buildfarm animal (peripatus) has been failing check since
>> >> yesterday.
>> >> Can someone look at it?
>> >
>> > It's been doing this in parallel queries, in v11 and up:
>> >
>> > 2019-09-29 19:00:15.534 CDT [49513:1] ERROR: could not open shared
>> > memory segment "/PostgreSQL.1225945786": Permission denied
>> > 2019-09-29 19:00:15.535 CDT [48596:491] pg_regress/partition_prune
>> > ERROR: parallel worker failed to initialize
>> > 2019-09-29 19:00:15.535 CDT [48596:492] pg_regress/partition_prune
>> > HINT: More details may be available in the server log.
>> > 2019-09-29 19:00:15.535 CDT [48596:493] pg_regress/partition_prune
>> > CONTEXT: PL/pgSQL function explain_parallel_append(text) line 5 at
>> > FOR over EXECUTE statement
>> > 2019-09-29 19:00:15.535 CDT [48596:494] pg_regress/partition_prune
>> > STATEMENT: select explain_parallel_append('select avg(ab.a) from ab
>> > inner join lprt_a a on ab.a = a.a where a.a in(1, 0, 0)');
>> > 2019-09-29 19:00:15.535 CDT [48596:495] pg_regress/partition_prune
>> > WARNING: could not remove shared memory segment
>> > "/PostgreSQL.1225945786": Permission denied
>> >
>> > which looks like an external problem to me --- certainly, nothing
>> > we changed yesterday would explain it. Did you change anything
>> > about the system configuration, or do a software update?
>> >
>> > regards, tom lane
>>
>> I did do an upgrade to a later SVN rev.
>>
>> Let me reboot and see if that fixes anything.
>>
>> (this is -CURRENT on FreeBSD, so it's always a moving target).
>
> Hi Larry,
>
> I'm seeing this on my FreeBSD 13 bleeding edge system too (built a
> couple of days ago) and will see if I can find out what's up with
> that. The most obvious culprit is the stuff that just landed in the
> kernel to support Linux-style memfd_create() and thereby changed
> around some shm_open() related things. Seems to be clearly not a
> PostgreSQL problem.
>
> Thanks,
> Thomas
Thanks, Thomas.
Here's my 2 SVN revs if that would help:
FreeBSD SVN rev:
r352600 - - 1.69G 2019-09-22 13:13
r352873 NR / 43.1G 2019-09-29 16:36
--
Larry Rosenman http://www.lerctr.org/~ler
Phone: +1 214-642-9640 E-Mail: ler@lerctr.org
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106