Setting sysctl values
=====================

By default, TPA sets various sysctl values on target instances, and
includes them in ``/etc/sysctl.conf`` so that they persist across
reboots.

You can optionally specify your own values in ``sysctl_values`` :

.. code:: yaml

   cluster_vars:
     sysctl_values:
       kernel.core_pattern: core.%e.%p.%t
       vm.dirty_bytes: 4294967296
       vm.zone_reclaim_mode: 0

Any values you specify will take precedence over TPA’s default values
for that variable (if any). The settings will first be added to
``sysctl.conf`` line-by-line, and finally loaded with ``sysctl -p`` .

Docker and lxd instances do not support setting sysctls, so TPA will
skip this step altogether for those platforms.