From: Richard Huxton <dev@archonet.com>
To: Douglas J Hunley <doug@hunley.homeip.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: 7 hrs for a pg_restore?
Date: Tue, 19 Feb 2008 18:13:37 +0000
Message-ID: <47BB1C51.6010203@archonet.com> (raw)
In-Reply-To: <200802191303.58840.doug@hunley.homeip.net>
References: <200802191303.58840.doug@hunley.homeip.net>
Douglas J Hunley 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.
Depends, both on the machine and the database.
What sort of disk i/o are you seeing, what's the cpu(s) doing, and
what's the restore taking so long over (since you have -v)?
Oh, and have you tweaked the configuration settings for the restore?
Lots of work_mem, turn fsync off, that sort of thing.
--
Richard Huxton
Archonet Ltd
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To: pgsql-performance@postgresql.org
Cc: dev@archonet.com, doug@hunley.homeip.net
Subject: Re: 7 hrs for a pg_restore?
In-Reply-To: <47BB1C51.6010203@archonet.com>
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