From owner-freebsd-current@FreeBSD.ORG  Tue Mar 30 00:01:37 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 5630A16A52A
	for <current@freebsd.org>; Tue, 30 Mar 2004 00:01:37 -0800 (PST)
Received: from white.imgsrc.co.jp (ns.imgsrc.co.jp [210.226.20.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP id AEC3543D2F
	for <current@freebsd.org>; Tue, 30 Mar 2004 00:01:36 -0800 (PST)
	(envelope-from kuriyama@imgsrc.co.jp)
Received: from localhost (localhost [127.0.0.1])
	by white.imgsrc.co.jp (Postfix) with ESMTP
	id 70B0228407C; Tue, 30 Mar 2004 17:01:35 +0900 (JST)
Received: from black.imgsrc.co.jp (black.imgsrc.co.jp
	[IPv6:2001:218:422:2::130])
	by white.imgsrc.co.jp (Postfix) with ESMTP
	id 0F63B284035; Tue, 30 Mar 2004 17:01:34 +0900 (JST)
Received: from black.imgsrc.co.jp (black.imgsrc.co.jp
	[IPv6:2001:218:422:2::130])
	by black.imgsrc.co.jp (Postfix) with ESMTP
	id 27CD31E462A; Tue, 30 Mar 2004 17:01:33 +0900 (JST)
Date: Tue, 30 Mar 2004 17:01:33 +0900
Message-ID: <7misgm931e.wl@black.imgsrc.co.jp>
From: Jun Kuriyama <kuriyama@imgsrc.co.jp>
To: Don Bowman <don@sandvine.com>
In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337045D87A8@mail.sandvine.com>
References: <FE045D4D9F7AED4CBFF1B3B813C85337045D87A8@mail.sandvine.com>
User-Agent: Wanderlust/2.10.1 (Watching The Wheels) SEMI/1.14.5 (Awara-Onsen)
	FLIM/1.14.5 (Demachiyanagi) APEL/10.6 Emacs/21.3 (i386--freebsd) MULE/5.0
	(SAKAKI)
MIME-Version: 1.0 (generated by SEMI 1.14.5 - "Awara-Onsen")
Content-Type: text/plain; charset=US-ASCII
X-Virus-Scanned: by AMaViS snapshot-20020531
cc: "'current@freebsd.org'" <current@freebsd.org>
Subject: Re: question about dump performance on a snapshot
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 30 Mar 2004 08:01:37 -0000

At Mon, 29 Mar 2004 22:04:36 +0000 (UTC),
Don Bowman wrote:
> I stopped postgresql, did a file system snapshot, and
> restarted postgresql. I then commenced a dump on the
> snap as below:
> 
> dump -0 -a -C 32 -f $dumpfile -u $snapfile

To separate where the problem is, could you try to out to /dev/null?

# dump -0 -a -C 32 -f /dev/null -u $snapfile


-- 
Jun Kuriyama <kuriyama@imgsrc.co.jp> // IMG SRC, Inc.
             <kuriyama@FreeBSD.org> // FreeBSD Project