Hey,
Deeply appreciate both your input!
On Thu, Feb 8, 2024 at 4:57 AM Heikki Linnakangas wrote:
> Hmm, there is a pair of SpinLockAcquire() and SpinLockRelease() in
> ProcKill(), before step 3 can happen. Comment in spin.h about
> SpinLockAcquire/Release:
>
> > *Load and store operations i
Hi,
On 2024-02-08 14:57:47 +0200, Heikki Linnakangas wrote:
> On 08/02/2024 04:08, Soumyadeep Chakraborty wrote:
> > A possible ordering of events:
> >
> > (1) DisownLatch() is called by pid Y during ProcKill() and the write for
> > latch->owner_pid = 0 is NOT yet flushed to shmem.
> >
> > (2) T
On 08/02/2024 04:08, Soumyadeep Chakraborty wrote:
A possible ordering of events:
(1) DisownLatch() is called by pid Y during ProcKill() and the write for
latch->owner_pid = 0 is NOT yet flushed to shmem.
(2) The PGPROC object for pid Y is returned to the free list.
(3) Pid X sees the same PGP
Hey hackers,
I wanted to report that we have seen this issue (with the procLatch) a few
times very sporadically on Greenplum 6X (based on 9.4), with relatively newer
versions of GCC.
I realize that 9.4 is out of support, so this email is purely to add on to the
existing thread, in case the info c
On 2022-Jul-13, Sandeep Thakkar wrote:
> Thanks Robert.
>
> We are receiving the alerts from buildfarm-admins for anole and gharial not
> reporting. Who can help to stop these? Thanks
Probably Andrew knows how to set buildsystems.no_alerts for these
animals.
--
Álvaro Herrera PostgreSQ
Thanks Robert.
We are receiving the alerts from buildfarm-admins for anole and gharial not
reporting. Who can help to stop these? Thanks
On Wed, Jul 6, 2022 at 1:27 AM Robert Haas wrote:
> On Sun, Jul 3, 2022 at 11:51 PM Thomas Munro
> wrote:
> > On Wed, Jun 1, 2022 at 12:55 AM Robert Haas
>
On Sun, Jul 3, 2022 at 11:51 PM Thomas Munro wrote:
> On Wed, Jun 1, 2022 at 12:55 AM Robert Haas wrote:
> > OK, I have access to the box now. I guess I might as well leave the
> > crontab jobs enabled until the next time this happens, since Thomas
> > just took steps to improve the logging, but
On Wed, Jun 1, 2022 at 12:55 AM Robert Haas wrote:
> OK, I have access to the box now. I guess I might as well leave the
> crontab jobs enabled until the next time this happens, since Thomas
> just took steps to improve the logging, but I do think these BF
> members are overdue to be killed off, a
On Tue, May 31, 2022 at 8:20 AM Robert Haas wrote:
> On Mon, May 30, 2022 at 8:31 PM Thomas Munro wrote:
> > On Sat, May 28, 2022 at 1:56 AM Robert Haas wrote:
> > > What I'm inclined to do is get gharial and anole removed from the
> > > buildfarm. anole was set up by Heikki in 2011. I don't kno
On Mon, May 30, 2022 at 8:31 PM Thomas Munro wrote:
> On Sat, May 28, 2022 at 1:56 AM Robert Haas wrote:
> > What I'm inclined to do is get gharial and anole removed from the
> > buildfarm. anole was set up by Heikki in 2011. I don't know when
> > gharial was set up, or by whom. I don't think any
On Sat, May 28, 2022 at 1:56 AM Robert Haas wrote:
> What I'm inclined to do is get gharial and anole removed from the
> buildfarm. anole was set up by Heikki in 2011. I don't know when
> gharial was set up, or by whom. I don't think anyone at EDB cares
> about these machines any more, or has any
On Sat, May 28, 2022 at 8:11 AM Tom Lane wrote:
> Robert Haas writes:
> > On Fri, May 27, 2022 at 10:21 AM Tom Lane wrote:
> >> What I'd suggest is to promote that failure to elog(PANIC), which
> >> would at least give us the PID and if we're lucky a stack trace.
>
> > That proposed change is fi
Robert Haas writes:
> On Fri, May 27, 2022 at 10:21 AM Tom Lane wrote:
>> What I'd suggest is to promote that failure to elog(PANIC), which
>> would at least give us the PID and if we're lucky a stack trace.
> That proposed change is fine with me.
> As to the question of whether it's a real bug
On Fri, May 27, 2022 at 10:21 AM Tom Lane wrote:
> That's possible, certainly. It's also possible that it's a real bug
> that so far has only manifested there for (say) timing reasons.
> The buildfarm is not so large that we can write off single-machine
> failures as being unlikely to hit in the
Robert Haas writes:
> On Fri, May 27, 2022 at 7:55 AM Thomas Munro wrote:
>> Thanks. Hmm. So far it's always a parallel worker. The best idea I
>> have is to include the ID of the mystery PID in the error message and
>> see if that provides a clue next time.
> ... Even if we find a bug in Pos
On Fri, May 27, 2022 at 7:55 AM Thomas Munro wrote:
> Thanks. Hmm. So far it's always a parallel worker. The best idea I
> have is to include the ID of the mystery PID in the error message and
> see if that provides a clue next time.
What I'm inclined to do is get gharial and anole removed fro
On Thu, May 26, 2022 at 2:35 PM Tom Lane wrote:
> Thomas Munro writes:
> > On a more practical note, I don't have access to the BF database right
> > now. Would you mind checking if "latch already owned" has occurred on
> > any other animals?
>
> Looking back 6 months, these are the only occurre
Thomas Munro writes:
> Sorry for the ambiguity -- I have no evidence of miscompilation. My
> "just BTW" paragraph was a reaction to the memory of the last couple
> of times Noah and I wasted hours chasing red herrings on this system,
> which is pretty demotivating when looking into an unexplained
On Thu, May 26, 2022 at 2:25 AM Tom Lane wrote:
> Noah Misch writes:
> > +1, this is at least the third non-obvious miscompilation from gharial.
>
> Is there any evidence that this is a compiler-sourced problem?
> Maybe it is, but it's sure not obvious to me (he says, eyeing his
> buildfarm anima
Noah Misch writes:
> +1, this is at least the third non-obvious miscompilation from gharial.
Is there any evidence that this is a compiler-sourced problem?
Maybe it is, but it's sure not obvious to me (he says, eyeing his
buildfarm animals with even older gcc versions).
r
On Tue, May 24, 2022 at 06:24:39PM -0700, Andres Freund wrote:
> On 2022-05-25 12:45:21 +1200, Thomas Munro wrote:
> > Just BTW, that animal has shown signs of a flaky toolchain before[1].
> > I know we have quite a lot of museum exhibits in the 'farm, in terms
> > of hardare, OS, and tool chain.
Andres Freund writes:
> On 2022-05-25 12:45:21 +1200, Thomas Munro wrote:
>> I know we have quite a lot of museum exhibits in the 'farm, in terms
>> of hardare, OS, and tool chain. In some cases, they're probably just
>> forgotten/not on anyone's upgrade radar. If they've shown signs of
>> misbe
Hi,
On 2022-05-25 12:45:21 +1200, Thomas Munro wrote:
> A couple of recent isolation test failures reported $SUBJECT.
Was that just on gharial?
> It could be a bug in recent-ish latch refactoring work, though I don't
> know why it would show up twice just recently.
Yea, that's weird.
> Just
Hi,
A couple of recent isolation test failures reported $SUBJECT.
It could be a bug in recent-ish latch refactoring work, though I don't
know why it would show up twice just recently.
Just BTW, that animal has shown signs of a flaky toolchain before[1].
I know we have quite a lot of museum exhib
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