Date: Mon, 10 Feb 2003 09:07:47 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@FreeBSD.ORG Subject: Re: I'm running out of swapspace Message-ID: <20030210090747.GB48543@happy-idiot-talk.infracaninophi> In-Reply-To: <3E46EC14.9090702@ameritech.net> References: <20030210004609.V41846-100000@amour.ath.cx> <3E46EC14.9090702@ameritech.net>
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On Sun, Feb 09, 2003 at 07:02:28PM -0500, northern snowfall wrote:
> One way to do it is to create a memory file system linked to a file on-disk.
> In FreeBSD 5.0-RELEASE, to create a 128MB additional swap space, I've tried:
> dd if=/dev/zero of=/swap0 count=128 bs=1m
> chmod 600 /swap0
> mdconfig -a -t vnode -f /swap0 -u 3
> swapon /dev/md3
> This will link the 128 megabyte file into swap space recognized by the
> system.
> Execute "swapinfo" to confirm:
> sandstone.north_ % swapinfo
> Device 1K-blocks Used Avail Capacity Type
> /dev/ad0s1b 524288 10136 514152 2% Interleaved
> /dev/md3 131072 1876 129196 1% Interleaved
> Total 655360 12012 643348 2%
> sandstone.north_ %
Cool. But mdconfig is new in 5.0. The equivalent way of doing this
in 4.x would be:
dd if=/dev/zero of=/swap0 count=128 bs=1m
chmod 600 /swap0
vnconfig -e vn0c /swap0 swap
where vnconfig(8) automatically does the swapon step for you.
vnconfig(8) still exists in 5.0, but all it will do is print a message
saying to use mdconfig(8).
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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