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Re: 7 hrs for a pg_restore?

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Douglas J Hunley <doug(at)hunley(dot)homeip(dot)net>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: 7 hrs for a pg_restore?
Date: 2008-02-19 18:12:54
Message-ID: 20080219101254.754bd94d@commandprompt.com (view raw or flat)
Thread:
Lists: pgsql-performance
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On Tue, 19 Feb 2008 13:03:58 -0500
Douglas J Hunley <doug(at)hunley(dot)homeip(dot)net> wrote:

> I spent a whopping seven hours restoring a database late Fri nite for
> a client. We stopped the application, ran pg_dump -v -Ft -b -o $db > 
> ~/pre_8.3.tar on the 8.2.x db, and then upgrading the software to
> 8.3. I then did a pg_restore -v -d $db ./pre_8.3.tar and watched it
> positively crawl. I'll grant you that it's a 5.1G tar file, but 7
> hours seems excessive. 
> 
> Is that kind of timeframe 'abnormal' or am I just impatient? :) If
> the former, I can provide whatever you need, just ask for it. 
> Thanks!

7 hours for 5.1 G is excessive. It took me 11 hours to do 220G :). It
would be helpful if we knew what the machine was doing. Was it IO
bound? How much ram does it have? Is it just a single HD drive? What
are your settings for postgresql?

Joshua D. Drake


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