| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Alex Hunsaker <badalex(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Back-patch use of unnamed POSIX semaphores for Linux? |
| Date: | 2016-12-07 23:27:46 |
| Message-ID: | 20161207232746.ufv2uu6gb3cqcmb5@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> Hmm ... after further experimentation, I still can't get this version of
> systemd (231) to do anything evil. It turns out that Fedora ships it with
> KillUserProcesses turned off by default, and maybe having that on is a
> prerequisite for the other behavior? But that doesn't make a lot of sense
> because we'd never be seeing the reports of databases moaning about lost
> semaphores if the processes got killed first. Anyway, I see nothing bad
> happening if KillUserProcesses is off, while if it's on then the database
> gets shut down reasonably politely via SIGTERM.
>
> Color me confused ... maybe systemd's behavior has changed?
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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