up:
  1. In /etc/sysctl.conf, set

    1. vm.swappiness = 0
      vm.dirty_writeback_centisecs = 1500
      
  2. In /etc/fstab, set / to noatime,commit=30,errors=remount-ro. Don't forget to disable grml-rebuildfstab in /etc/grml/autoconfig!