Hi, to master was merged patch that removed default values for engine options [1]. Now all values are present in 0000_config. For adding new engine option, besides adding it in ConfigValues, add it also into 0000_config (using procedure *fn_db_add_config_value* or *fn_db_add_config_value_for_versions_up_to*). Thanks, Mirka [1] https://gerrit.ovirt.org/#/c/81464/ <https://gerrit.ovirt.org/#/c/81464/>