4 ms·

Can you not protect processes from the oomkiller? This is trivial and very useful on FreeBSD https://www.freebsd.org/cgi/man.cgi?query=protect&sektion=1 https:

• mwpmaybe 10y ago
  Yes, with oom_score_adj[0], which I've mentioned several times. Setting it to -1000 for a process protects it from OOM killing. 0. http://man7.org/linux/man-pages/man5/proc.5.html http://man7.org/linux/man-pages/man5/proc.5.html
  • feld 10y ago
    that looks painful to use. Do Linux distros let you automatically protect services? E.g. On FreeBSD: mysql_enable="YES" mysql_oomprotect="YES" Now every time you start the MySQL service it's automatically protected
    • viraptor 10y ago
      Define "automatically" and "services" first ;-) Normally you just set it in the systemd's unit file for each daemon you want to adjust. So for some definitions of the above the answer is yes. (OOMScoreAdjust in https://www.freedesktop.org/software/systemd/man/systemd.exec.html https://www.freedesktop.org/software/systemd/man/systemd.exe...)
      • JdeBP 10y ago
        Personally, I use one tool for both FreeBSD and Linux. Picking up the (imported) rc.conf variable for a service is a mere matter of oom-kill-protect fromenv And the conversion from something like OOMScoreAdjust is quite straightforward. A PostgreSQL systemd unit file that read OOMScoreAdjust=-625 becomes a run program that contains oom-kill-protect -- -625 * http://marc.info/?l=freebsd-hackers&m=145425153624976&w=2 http://marc.info/?l=freebsd-hackers&m=145425153624976&w=2 * http://jdebp.eu./Softwares/nosh/guide/oom-kill-protect.html http://jdebp.eu./Softwares/nosh/guide/oom-kill-protect.html
      • feld 10y ago
        Cool, thanks for sharing. I would hate to have to muck around in /proc manually to set this.