From owner-freebsd-current  Fri Apr 24 17:07:17 1998
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id RAA02428
          for freebsd-current-outgoing; Fri, 24 Apr 1998 17:07:17 -0700 (PDT)
          (envelope-from owner-freebsd-current@FreeBSD.ORG)
Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA02380
          for <current@FreeBSD.ORG>; Fri, 24 Apr 1998 17:07:10 -0700 (PDT)
          (envelope-from toor@dyson.iquest.net)
Received: (from root@localhost)
	by dyson.iquest.net (8.8.8/8.8.8) id TAA03846;
	Fri, 24 Apr 1998 19:07:00 -0500 (EST)
	(envelope-from toor)
From: "John S. Dyson" <toor@dyson.iquest.net>
Message-Id: <199804250007.TAA03846@dyson.iquest.net>
Subject: Re: sysctl from Linux (*envy*)
In-Reply-To: <19980424224346.35645@follo.net> from Eivind Eklund at "Apr 24, 98 10:43:46 pm"
To: eivind@yes.no (Eivind Eklund)
Date: Fri, 24 Apr 1998 19:07:00 -0500 (EST)
Cc: current@FreeBSD.ORG
X-Mailer: ELM [version 2.4ME+ PL38 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

> 
> overcommit_memory:
> 
> This file contains only one value. The following algorithm
> is used to decide if there's enough memory. If the value
> of overcommit_memory > 0, then there's always enough
> memory :-). This is a useful feature, since programs often
> malloc() huge amounts of memory 'just in case', while they
> only use a small part of it. Leaving this value at 0 will
> lead to the failure of such a huge malloc(), when in fact
> the system has enough memory for the program to run...
> On the other hand, enabling this feature can cause you to
> run out of memory and thrash the system to death, so large
> and/or important servers will want to set this value to 0.
> 
> 
> 
> This supposedly also handles things like fork() etc.  Linux shouldn't
> have any server-directed features FreeBSD doesn't!
> 
Agreed.  I have been working on it, until I had my programming
breakdown early this week.  Look for it soon.  I have the accounting
in my kernel (but it is broken right now.)  I haven't implemented
the limit yet.

John

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message