Re: patch to allow disable of WAL recycling

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Jerry Jelinek <jerry(dot)jelinek(at)joyent(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: patch to allow disable of WAL recycling
Date: 2019-03-06 18:02:20
Message-ID: 20190306180220.GA15423@alvherre.pgsql
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On 2019-Mar-06, Robert Haas wrote:

> On Wed, Mar 6, 2019 at 12:13 PM Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> > I want your dictating software.
>
> I'm afraid this is just me and a keyboard, but sadly for me you're not
> the first person to accuse me of producing giant walls of text.

Well, I don't have a problem reading long texts; my problem is that I'm
unable to argue as quickly.

I do buy your argument, though (if reluctantly); in particular I was
worried to offer a parameter (to turn off zero-filling of segments) that
would enable dangerous behavior, but then I realized we also have
fsync=off of which the same thing can be said. So I agree we should
have two GUCs, properly explained, with a warning where appropriate.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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