Date: Wed, 1 Dec 2004 03:27:11 +0000 (GMT) From: r.p.demarco@att.net To: freebsd-questions@freebsd.org Subject: Can 10M Buffer Ceiling be lowere? Message-ID: <20041201032716.8FBA043D5C@mx1.FreeBSD.org>
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A technical question:
I have an old NEC computer (c. 1997) running 5.3-RELEASE with
48M of RAM. Getting a new computer isn't an option right now, but
I would like to get as much out of my memory as possible.
My /boot/kernel/kernel file is about 3M, and from the initial
boot:
real memory = 50331648 (48 MB)
avail memory = 43896832 (41 MB)
it appears this kernel takes up about 7M of memory with one screen saver
kld loaded. With a few unneeded services (cron, sendmail) disabled, I
start off with about 26M free after a fresh reboot with just root logged in,
running `top'. Looking at top, I noticed:
Mem: 4320K Active, 15M Inact, 12M Wired, 10M Buf, 11M Free
^^^
From TOP(1):
Buf: number of pages used for BIO-level disk caching
Actually, the 10M is after some disk usage (it starts ~6M).
It never gets above 10M. Is there anyway to adjust this, to
(say) a maximum of 5M? Yes, a new 256 MB RAM system would be nice,
but until then, I would like to avoid serious paging running xclock :)
Thanks,
-Rob
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