From owner-freebsd-questions@FreeBSD.ORG  Sat Jul 26 22:17:56 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id CF3B1106567C
	for <freebsd-questions@freebsd.org>;
	Sat, 26 Jul 2008 22:17:56 +0000 (UTC) (envelope-from bc979@lafn.org)
Received: from zoom.lafn.org (zoom.lafn.org [206.117.18.8])
	by mx1.freebsd.org (Postfix) with ESMTP id AE98F8FC21
	for <freebsd-questions@freebsd.org>;
	Sat, 26 Jul 2008 22:17:56 +0000 (UTC) (envelope-from bc979@lafn.org)
Received: from [10.0.1.196] (pool-71-109-162-173.lsanca.dsl-w.verizon.net
	[71.109.162.173]) (authenticated bits=0)
	by zoom.lafn.org (8.14.2/8.14.2) with ESMTP id m6QMHtTx010840
	(version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO)
	for <freebsd-questions@freebsd.org>;
	Sat, 26 Jul 2008 15:17:55 -0700 (PDT) (envelope-from bc979@lafn.org)
Message-Id: <EE1CF633-524E-4AE3-8224-685D71652F36@lafn.org>
From: Doug Hardie <bc979@lafn.org>
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (Apple Message framework v926)
Date: Sat, 26 Jul 2008 15:17:54 -0700
X-Mailer: Apple Mail (2.926)
X-Virus-Scanned: ClamAV 0.92.1/7838/Sat Jul 26 11:35:52 2008 on zoom.lafn.org
X-Virus-Status: Clean
Subject: malloc options
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 26 Jul 2008 22:17:56 -0000

I have a program that has run correctly since FreeBSD 3.7.  However,  
when upgrading the server to 7.0 I am encountering issues where values  
just seem to arbirtrarily change.  These values are all located in  
memory allocated by malloc.  Malloc was significantly changed with 7.0  
and reading through the malloc man page there are a number of flags  
that can be set with /etc/malloc.conf.  The default for that file is  
to not exist.  The man page does not indicate which settings are used  
in that situation.  After reading through it I get the feeling that  
the default settings for D and M are 'dM'.  Hence, to return to the  
older malloc aproach to see if the problems go away I would need to  
set "Dm".  But some of the descriptions seem to indicate that might  
not be correct.  What are the default settings?