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Re: Keepalive for max_standby_delay

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Keepalive for max_standby_delay
Date: 2010-06-28 07:17:48
Message-ID: 1277709468.25074.63629.camel@ebony (view raw or flat)
Thread:
Lists: pgsql-hackers
On Wed, 2010-06-16 at 21:56 -0400, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Wed, Jun 9, 2010 at 8:01 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >> Yes, I'll get with it ...
> 
> > Any update on this?
> 
> Sorry, I've been a bit distracted by other responsibilities (libtiff
> security issues for Red Hat, if you must know).  I'll get on it shortly.

I don't think the PostgreSQL project should wait any longer on this. If
it does we risk loss of quality in final release, assuming no slippage.

>From here, I will rework my patch of 31 May to
* use arrival time on standby as base for max_standby_delay
* make delay apply to both streaming and file cases
* min_standby_grace_period - min grace on every query, default 0

Decision time, so thoughts please?

-- 
 Simon Riggs           www.2ndQuadrant.com



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