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Re: pg_standby supported versions

From: Mark Kirkwood <markir(at)paradise(dot)net(dot)nz>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Decibel! <decibel(at)decibel(dot)org>, pgsql-docs(at)postgresql(dot)org
Subject: Re: pg_standby supported versions
Date: 2008-11-26 09:14:58
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Lists: pgsql-docs
Simon Riggs wrote:
> On Fri, 2008-08-22 at 00:50 -0500, Decibel! wrote:
>> On Aug 13, 2008, at 4:59 AM, Mark Kirkwood wrote:
>>> I noticed in the docs for pg_standby (docs/src/sgml/pgstandby.sgml)  
>>> that we have supported version >= 8.2. However it does seem to work  
>>> ok with earlier versions (e.g 8.1) - or am I missing something?
>> Hrm, AFAIK it works... Simon?
> It works, yes. But in basic form only.
> You'll have problems stopping and starting standby, but the most
> important change is that the process is not restartable. So if you run
> it for a month and then crash, you'll need to re-run the whole month's
> WAL data.
Exactly, after posting this I discovered the relevant CVS logs for 
changes to support restartable recovery. It seems to me that perhaps a 
little more detail in the docs would be good here.

At work some folks are using pg_standby with 8.1 and while it does work 
quite well, it took me a wee while to figure out that some of the issues 
they are having are tied up with inability to continue recovery after 
restarting the database or the os!

Best wishes


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