How can I test that NBD Swap is working?

Zackary Boarman zackboarman at
Mon Sep 3 22:35:52 UTC 2007

When the client's boot using LTSP it uses the RAM OF THE SERVER, so the
ram on the client won't have any effect unless it is the video ram,
which is more than likely not it, because webpages don't wouldn't even
use 2mb of vram. So is there any other kids using the server when the
freezes, then the server may be running out of ram, goto System >
Administration > System Monitor & go to the webpage another time & see
if the ram usage goes up, or if swap usage goes up.

Zackary P. Boarman
zackboarman at
zackboarman at


On Sat, 1 Sep 2007 09:46:38 -0500 Jim Kronebusch wrote:
        I don't think that nbdswap is working right.  When the client
        boots it creates a file in
        /tmp on the server with the correct swap size.  However if I
        load a graphic intense
        website that uses up available RAM and the client freezes, it
        freezes at the same point
        whether swap is set to 32MB or 128MB.  This leads me to believe
        it is not taking
        advantage of the swap space.  This is running Edubuntu 7.04, I
        have "NBD_SWAP=True" in
        "/opt/ltsp/i386/etc/lts.conf" and have created a
        "/etc/ltsp/nbdswapd.conf" file which
        contains the line "SIZE=128".
        Jim Kronebusch
        Cotter Tech Department
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