Re: 9.2 recovery/startup problems

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 9.2 recovery/startup problems
Date: 2014-12-02 15:41:14
Message-ID: CA+TgmoZ=CuSRtrX8=Re8C6=0_DUma0WB3qKKRo4EiyURQ72v4w@mail.gmail.com
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On Wed, Nov 26, 2014 at 7:13 PM, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
> If I do a pg_ctl stop -mf, then both files go away. If I do a pg_ctl stop
> -mi, then neither goes away. It is only with the /sbin/reboot that I get
> the fatal combination of _init being gone but the other still present.

Eh? That sounds wonky.

I mean, reboot normally kills processes with SIGTERM or SIGKILL, in
which case I'd expect the outcome to match what you get with pg_ctl
stop -mf or pg_ctl stop -mi. The only way I can see that you'd get a
different behavior is if you did a hard reboot (like echo b >
/proc/sysrq-trigger); if that changes things, then we might have a
missing-fsync bug. How is that reboot managing to leave the main fork
behind while losing the init fork?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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