Date: Tue, 28 Nov 2000 17:12:03 +0100 From: Andre Oppermann <oppermann@telehouse.ch> To: joeo@cracktown.com Cc: chat@freebsd.org Subject: Re: Netbsd advances... Message-ID: <3A23D953.A4C4FFD9@telehouse.ch> References: <Pine.LNX.4.04.10011281136530.7915-100000@ra.nks.net>
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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
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