---------- Forwarded Message -----------
From: "Jim Kronebusch" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Sent: Sun, 2 Sep 2007 14:03:04 -0500
Subject: How to keep X from consuming all available client RAM
Here is another tip provided by Scott Balnaeves. If you are having trouble
with an
application causing X to consume an overly large amount of RAM (which can
result in a
hard freeze of the client) you can use the following to add a variable to
lts.conf which
will prevent X from consuming a set limit of RAM.
First add the following to "/opt/ltsp/i386/usr/lib/ltsp/screen.d/ldm" above the
last
line in the file that currently reads "exec ldm vt$ttynum :$displaynumexec":
XRAMPERC=${XRAMPERC:-100}
if [ ${XRAMPERC} -lt 100 ]; then
XMEM=0
while read TYPE VALUE UNITS; do
case ${TYPE} in
MemFree:|SwapFree:)
XMEM=$((${XMEM} + ${VALUE}))
;;
esac
done < /proc/meminfo
XMEM=$((${XMEM} * ${XRAMPERC} / 100))
ulimit -v ${XMEM}
fi
Save the file and then modify /opt/i386/ltsp/etc/lts.conf and add the following
to your
[Default] section:
# Set maximum percentage of RAM consumed by X
XRAMPERC=95
And then save the file. Set this to the maximum percentage of RAM you ever
want X to be
able to consume. In the example above X will never use more than 95% of total
available
memory (this includes RAM and the nbdswap file). Say in the instance of
firefox, upon
access of a website that would use more than 95% of available total system
memory,
Firefox will immediately crash (not gracefully either and with no error
message). So
although this isn't pretty, it does keep your client from hard freezing with no
other
alternatives than a manual reboot.
Jim Kronebusch
Cotter Tech Department
453-5188
------- End of Forwarded Message -------
Jim Kronebusch
Cotter Tech Department
453-5188
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