Re: Why does WAL_DEBUG macro need to be defined by default?

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Why does WAL_DEBUG macro need to be defined by default?
Date: 2011-10-08 01:59:40
Message-ID: 201110080159.p981xeX10170@momjian.us
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Robert Haas wrote:
> On Fri, Oct 7, 2011 at 4:06 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> > Robert Haas wrote:
> >> On Fri, Oct 7, 2011 at 1:03 PM, Kevin Grittner
> >> <Kevin(dot)Grittner(at)wicourts(dot)gov> wrote:
> >> > Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> >> >> The funny thing is that I've been thinking all of these months
> >> >> about how convenient it is that we defined WAL_DEBUG in debug
> >> >> builds
> >> >
> >> > IMO, --enable-debug should not do anything but include debugging
> >> > symbols. ?The ability to get a useful stack trace from a production
> >> > crash, without compromising performance, is just too important by
> >> > itself to consider conditioning any other behavior on it.
> >>
> >> So, should I go revert this change in head and 9.1, or does anyone
> >> else want to argue for Heikki's position that we should just leave it
> >> on, on the theory that it's too cheap to matter?
> >
> > I would just fix it in head.
>
> That just seems weird. Either it's cheap enough not to matter (in
> which case there's no reason to revert that change at all) or it's
> expensive enough to matter (in which case presumably we don't want to
> leave it on in 9.1 for the 5 years or so it remains a supported
> release).

I am concerned about changing behavior on people in a minor release ---
it is not about risk in this case.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +

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