Date: Tue, 28 Nov 2000 11:38:54 -0500 (EST) From: <joeo@cracktown.com> To: chat@freebsd.org Subject: Netbsd advances... Message-ID: <Pine.LNX.4.04.10011281136530.7915-100000@ra.nks.net>
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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.
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