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I'm using a background service that leaks memory from time to time. To prevent using the Alt+SysRq REISUB[1], I'd like to restrict the RAM usage for one process or a system user.
I really would like to say: User x may use the maximum amount of RAM of 1 GB.
Is this feasible? Do I need kind of virtual machine for this? I'm using Ubuntu 9.10.
guerda
Posted 2009-11-05T21:10:23.673
Reputation: 1 441
10
ulimit is your friend. Check out the -m flag. I think you set this before you launch your process and it applies from then on (in the current shell).
basszero
Posted 2009-11-05T21:10:23.673
Reputation: 652
4
In addition to the shell commands ulimit (for bash) or limit (for csh), you can control this from inside your code with the ulimit() function.
KeithB
Posted 2009-11-05T21:10:23.673
Reputation: 8 506
1
Obligatory manpages: http://linux.die.net/man/1/ulimit (shell command) and http://linux.die.net/man/3/ulimit (C function).
– Stephan202 – 2009-11-05T21:34:45.810
Thanks, nice hint! As I understand ulimit, it limits all users memory/process/whatever consumption. I just like to limit it to one user/process & subprocesses. – guerda – 2009-11-05T21:52:02.683
1ulimit is a shell command, and only affects processes started from the same shell after ulimit is executed. You startup the process in a shell script with a ulimit command to have it affect just that process. – KeithB – 2009-11-06T01:52:30.573