# https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
{% if grains['kernel'] == 'Linux' %}
  {% if grains['virtual'] == 'kvm' or grains['virtual'] == 'qemu' %}
  vm.dirty_background_ratio:
    sysctl.present:
      - value: 10
  vm.dirty_background_bytes:
    sysctl.present:
      - value: 10
  vm.dirty_ratio:
    sysctl.present:
      - value: 20
  vm.dirty_bytes:
    sysctl.present:
      - value: 0
  vm.dirty_writeback_centisecs:
    sysctl.present:
      - value: 500
  vm.dirty_expire_centisecs:
    sysctl.present:
      - value: 3000
  {% endif %}
{% endif %}