Matt Zinicola <mattzinicola@gmail.com> writes:
> I changed hardware and OS, too, moving from older hardware and (pre-systemd) Fedora 14 to Fedora 25. I used that as
anopportunity to upgrade Postgres from 9.5.5 to 9.6.2.
Ah. So the problem came in with systemd. See the already-cited
references for ways to prevent systemd from zapping you.
We have a better answer lined up for PG10 --- viz, don't use
SysV-style semaphores anymore --- but nobody wanted to risk
back-patching such a major change into stable branches.
regards, tom lane
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