From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alex Hunsaker <badalex@gmail.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Back-patch use of unnamed POSIX semaphores for Linux?
Date: Wed, 7 Dec 2016 20:27:46 -0300
Message-ID: <20161207232746.ufv2uu6gb3cqcmb5@alvherre.pgsql> (raw)
In-Reply-To: <32665.1481150572@sss.pgh.pa.us>
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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?
https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/ZNQW72UP36UAFMX53...
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Cc: alvherre@2ndquadrant.com, tgl@sss.pgh.pa.us, badalex@gmail.com, robertmhaas@gmail.com
Subject: Re: Back-patch use of unnamed POSIX semaphores for Linux?
In-Reply-To: <20161207232746.ufv2uu6gb3cqcmb5@alvherre.pgsql>
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