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From: ktm@rice.edu <ktm@rice.edu>
To: Wells Oliver <wellsoliver@gmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: Upgrading from 9.1 to 9.2 in place, same machine
Date: Wed, 10 Jul 2013 14:03:21 -0500
Message-ID: <20130710190321.GI3001@aart.rice.edu> (raw)
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On Wed, Jul 10, 2013 at 11:52:54AM -0700, Wells Oliver wrote:
> Can anyone speak to the speed of pg_upgrade? Our database is 153GB. From
> 9.1 to 9.2, I'm nervous it might take hours. If it were less than hour,
> downtime would be more acceptable.
> 

You can use the --link option and then you make hard links instead of
requiring a copy of the data files. It should be pretty fast. Without
--link a copy of 153GB could take a while. :)

http://www.postgresql.org/docs/9.2/interactive/pgupgrade.html

Ken


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