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From: Alvaro Herrera <alvherre@commandprompt.com>
To: Tena Sakai <tsakai@gallo.ucsf.edu>
Cc: Marcelo Martins <pglists@zeroaccess.org>
Cc: jeff@frostconsultingllc.com
Cc: pgsql-admin@postgresql.org
Subject: Re: restoring from dump
Date: Tue, 26 Aug 2008 10:29:59 -0400
Message-ID: <20080826142959.GC4920@alvh.no-ip.org> (raw)
In-Reply-To: <FE44E0D7EAD2ED4BB2165071DB8E328C0378F428@egcrc-ex01.egcrc.org>
References: <48AFA015.2000909@frostconsultingllc.com>
	<FE44E0D7EAD2ED4BB2165071DB8E328C0378F416@egcrc-ex01.egcrc.org>
	<Pine.LNX.4.64.0808232228540.5906@discord.home.frostconsultingllc.com>
	<FE44E0D7EAD2ED4BB2165071DB8E328C0378F417@egcrc-ex01.egcrc.org>
	<22746678-86BF-4F63-9F3D-6B822B9FFC47@zeroaccess.org>
	<FE44E0D7EAD2ED4BB2165071DB8E328C0378F41A@egcrc-ex01.egcrc.org>
	<F4F56732-874A-4A10-A445-E43CBD49F971@zeroaccess.org>
	<FE44E0D7EAD2ED4BB2165071DB8E328C0378F425@egcrc-ex01.egcrc.org>
	<20080826023406.GF15097@alvh.no-ip.org>
	<FE44E0D7EAD2ED4BB2165071DB8E328C0378F428@egcrc-ex01.egcrc.org>

Tena Sakai wrote:
> Hi Alvaro,
> 
> I just looked in pg_clog directory and there is
> only one file:
>   -rw-------  1 postgres postgres 24576 Aug 25 20:18 0000
> I saw the same file about 10:30 am and I believe
> it was roughly the same size.  This is a brand new
> installation of 8.3.3.

Maybe initdb was executed?  That would cause the files to disappear.
Of course, so would the data; it would have to be restored from a
backup.

Note that these files use only 2 bits per transaction, so in 24756 bytes
you have enough room to cover 99024 transactions.  Furthermore, they
always grow in 8192-byte increments.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.



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