#
# Copyright 2014, NICTA
#
# This software may be distributed and modified according to the terms of
# the BSD 2-Clause license. Note that NO WARRANTY is provided.
# See "LICENSE_BSD2.txt" for details.
#
# @TAG(NICTA_BSD)
#
Running 64-bit Isabelle is a dangerous task. In particular, it is liable to
suck up all your RAM and send your system into swap-death on quite a regular
basis.
This Linux utility will regularly scan the system for signs of swap-death
(i.e., low memory and high pagefault rate and high load average) and send
SIGSTOP to processes suspected of being the cause.
Compile, and setup the script to run in root's home directory as follows:
gcc -O2 stop.c -o stop
sudo mv stop /root
Then add the following line to root's crontab:
@reboot /root/stop
When it triggers, it will write to syslog stating the process stopped.
Known problems:
* Chrome is memory hungry, so it will often stop your chrome processes
prior to Isabelle.
* Compiz is memory hungry, so it will sometimes stop your compiz process
before Isabelle.
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