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I think my subject is pretty spot on. I am on Ubuntu 10.04 and have the following specs in my computer:

  • i5 Processor with 3.30GHz
  • 16GB Memory
  • 1TB Hard drive
  • 1 Gigabyte on board network

I am running 10 users at the same time, as virtual computers (terminals) from NComputing.

I am using around max 8 - 10 GB Memory when computer is running at the fullest. I have the following applications that all the 10 users use simultaneously:

  • Firefox
  • LibreOffice
  • Thunderbird
  • Many other folders
  • Lot of printing

Around 8am - 15:00pm, my computer (actually server) is running absolutely fine, then around 15:00 - 14:30 upon leaving, the computer just freezes for not reason, without giving warnings. I have to force the computer of by the powers, can't even use the reset button.

I was told from the NComputing hadrware/software people, that I should do a memory dump of all the terminated processes for each user that are working - that will be 10 users.

I do I do that, freeing up memory dumps, and should I even experience anything like it?

Look at how strong, and fast my computer is, can that even be then a problem?

Any help?

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One solution from over on ServerFault direct quote:

I've made a script that accomplishes this task.

The idea commes from James Lawrie's answer and this post:


grep rw-p /proc/$1/maps | sed -n 's/^\([0-9a-f]*\)-\([0-9a-f]*\) .*$/\1 \2/p' | while read start stop; do gdb --batch --pid $1 -ex "dump memory $1-$start-$stop.dump 0x$start 0x$stop"; done

put this in a file (eg. "") and make it executable

usage: ./ [pid]

The output is printed to files with the names: pid-startaddress-stopaddress.dump

Dependencies: gdb

end quote

The only thing to add is a loop to iterate over all PIDs.

share|improve this answer
Wel, sound like this can be an answer, but this sound way difficult - will have a look at that link – Tim Botha Aug 24 '12 at 12:07
@TimBotha - just an FYI, I'm looking at possibly throwing together a simple gui to do this and more. It may or may not happen though. – RobotHumans Aug 24 '12 at 23:48

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