Re: Default mode for shutdown

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Magnus Hagander <magnus(at)hagander(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Default mode for shutdown
Date: 2010-12-15 14:44:39
Message-ID: AANLkTinFKGPvZ0m93QxFo9P-qP-kyn4Wz+Cw+4k0LedU@mail.gmail.com
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On Wed, Dec 15, 2010 at 9:39 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Magnus Hagander <magnus(at)hagander(dot)net> writes:
>> I'm sure this has been up before, but hey, let's take it another round.
>> Why don't we change the default shutdown mode for pg_ctl from "smart"
>> to "fast"? I've never come across a single usecase where "smart" is
>> what people *want*...

+1. I think we should either have a timeout for "smart" shutdown mode
such that it turns into a fast shutdown after a configurable number of
seconds that defaults to, say, 30; or we should just make the default
fast shutdown as proposed.

> Really?  Personally I'm quite happy with that default.

Why? It seems to me that just leads to, oh, gee, the database isn't
shutting down, where's the window where I failed to exit a session?
And it's even worse in production, where whatever you're using for
connection pooling ensures that shutdown will take, if not forever, at
least a very, very long time.

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

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