From owner-freebsd-chat Tue Nov 28 8:12:34 2000 Delivered-To: freebsd-chat@freebsd.org Received: from mailtoaster1.pipeline.ch (mailtoaster1.pipeline.ch [62.48.0.70]) by hub.freebsd.org (Postfix) with SMTP id 5BEFB37B400 for ; Tue, 28 Nov 2000 08:12:32 -0800 (PST) Received: (qmail 84563 invoked from network); 28 Nov 2000 16:10:37 -0000 Received: from unknown (HELO telehouse.ch) ([62.48.0.139]) (envelope-sender ) by mailtoaster1.pipeline.ch (qmail-ldap-1.03) with SMTP for ; 28 Nov 2000 16:10:37 -0000 Message-ID: <3A23D953.A4C4FFD9@telehouse.ch> Date: Tue, 28 Nov 2000 17:12:03 +0100 From: Andre Oppermann X-Mailer: Mozilla 4.74 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: joeo@cracktown.com Cc: chat@freebsd.org Subject: Re: Netbsd advances... References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org AFAIK FreeBSD does this for five years now... nothing new in little china. joeo@cracktown.com wrote: > > Just noticed this over on the netbsd home page... > > UBC code integrated into NetBSD-current (27 Nov) (top) > > Chuck Silvers has integrated the Unified Buffer Cache project code > into NetBSD-current. To build a new -current kernel from an existing > kernel configuration file, you'll want to remove any settings for > "BUFCACHE", "NBUF", or "BUFPAGES", and let the size of the buffer cache go > back to the default. After that, you'll need to rerun config, and then you > can build away. > > Under UBC, the traditional buffer cache is no longer used for storing > regular data, only metadata, so you'll want to allow the VM system to > manage most of your physical memory. The default buffer cache size will be > fine for most people, regardless of the amount of memory in the machine. > > What does this mean for you? For most people, more memory will be > available for caching regular file data, so filesystem i/o will be faster > since there will be more times when the data you're accessing is already > in memory. How much faster depends on what you're doing, but you'll > probably notice the difference. > > More information is available in Chuck's announcement in the > current-users mail archive. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-chat" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message