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From: Simon Riggs <simon@2ndQuadrant.com>
To: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: Hot Standby on git
Date: Fri, 02 Oct 2009 08:55:14 +0100
Message-ID: <1254470114.17864.305.camel@ebony.2ndQuadrant> (raw)
In-Reply-To: <4AC5AC7A.8070801@enterprisedb.com>
References: <1253958559.4449.833.camel@ebony.2ndQuadrant>
	<4AC37D2D.9060400@enterprisedb.com>
	<1254406060.17864.219.camel@ebony.2ndQuadrant>
	<4AC5AC7A.8070801@enterprisedb.com>


On Fri, 2009-10-02 at 10:32 +0300, Heikki Linnakangas wrote:
> Simon Riggs wrote:
> > I will docuemnt the recommendation to set max_standby_delay = 0 if
> > performing an archive recovery (and explain why).
> 
> Hmm, not sure if that's such a good piece of advice either. It will mean
> waiting for queries forever, which probably isn't what you want if
> you're performing archive recovery. Or maybe it is? Maybe -1? I guess it
> depends on the situation...

That assumes that the purpose of the archive recovery is more important
than running queries. As you say, it would mean always waiting. But the
beauty is that you *can* run queries to determine when to stop, so
having them cancelled defeats that purpose.

-- 
 Simon Riggs           www.2ndQuadrant.com




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