From owner-freebsd-hackers Fri Jul 16 5: 7:32 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from kozlik.carrier.kiev.ua (kozlik.carrier.kiev.ua [193.193.193.111]) by hub.freebsd.org (Postfix) with ESMTP id 6D0C214C37 for ; Fri, 16 Jul 1999 05:07:27 -0700 (PDT) (envelope-from nx@nn.kiev.ua) Received: from nn.UUCP (uucp@localhost) by kozlik.carrier.kiev.ua (8.The.Best/UUCP_FOREVER) with UUCP id PAA28525 for freebsd-hackers@freebsd.org; Fri, 16 Jul 1999 15:03:16 +0300 (EEST) (envelope-from nx@nn.kiev.ua) Received: from nn.UUCP (uucp@localhost) by kozlik.carrier.kiev.ua (rmail mypid=28524 childpid=28525) with UUCP; Fri, 16 Jul 1999 12:03:16 +0000 GMT Received: by nn.kiev.ua (UUPC/@ v7.00, 29Jul97) id AA06197; Fri, 16 Jul 1999 15:00:56 +0300 (EDT) To: freebsd-hackers@freebsd.org X-Comment-To: "Daniel C. Sobral" References: <378CA22C.E5537F7A@newsguy.com> Message-ID: From: "Valentin Nechayev" Date: Fri, 16 Jul 1999 15:00:56 +0300 (EDT) X-Mailer: dMail [Demos Mail for DOS v2.06] Subject: Re: Replacement for grep(1) (part 2) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 23 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Daniel C. Sobral wrote: > > 4.4BSD derived system cannot do this, and have to use different > > machine for such applications. > > Incorrect. We can set *limits* to the users, so they won't be able > to crash down the system. No. Really, not all users are used system in the same time. And it is too cruel to set too small limits. And, average system has user limits quite more than (total_resource*2/3)/n_users (2/3 is sub-optimal modifier). But, if too many users began to use system, they can overflow the resource. Group limits can make problem softer, but not more than a little. I don't remember now English word for soft barrier, the Russian word is 'dempfer' ;) System must provide such soft barrier to prevent overflow long far from the real overflow. Imho, 20% of typical critical resource must be prevented. -- Netch To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message