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Re: HS/SR and smart shutdown

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: HS/SR and smart shutdown
Date: 2010-01-29 22:59:08
Message-ID: 1264805948.13782.87.camel@ebony (view raw or flat)
Thread:
Lists: pgsql-hackers
On Thu, 2010-01-21 at 09:27 +0200, Heikki Linnakangas wrote:

> Right, that's the way a standby server (= one still in recovery) has
> always behaved. It has made sense in the past: it's not in the spirit
> of smart shutdown to kill the WAL replay immediately. "smart" means
> wait for recovery to finish, then shutdown.
> 
> It's a good question if that still makes sense with Hot Standby.
> Perhaps we should redefine smart shutdown in standby mode to shut down
> as soon as all read-only connections have died.

It's clear that "smart" shutdown doesn't work while something is active.
Recovery is "active" and so we shouldn't shutdown. It makes sense, it
works like this already, lets leave it. Document it if needed.

-- 
 Simon Riggs           www.2ndQuadrant.com


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