MTUNE(F)                                   UNIX System V



     Name
          mtune - tunable parameter file


     Syntax
          /etc/conf/cf.d/mtune


     Description
          The mtune file contains information  about  all  the  system
          tunable  parameters.  Each tunable parameter is specified by
          a single line in  the  file,  and  each  line  contains  the
          following whitespace-separated set of fields:

          1.   parameter name: A character  string  no  more  than  20
               characters   long.    It   is  used  to  construct  the
               preprocessor ``#define's'' that pass the value  to  the
               system when it is built.

          2.   default value: This is the default value of the tunable
               parameter.   If the value is not specified in the stune
               file, this value will be used when the system is built.

          3.   minimum value: This is the minimum allowable value  for
               the  tunable parameter.  If the parameter is set in the
               stune file, the configuration tools  will  verify  that
               the new value is equal to or greater than this value.

          4.   maximum value: This is the maximum allowable value  for
               the  tunable parameter.  If the parameter is set in the
               stune file, the configuration tools will check that the
               new value is equal to or less than this value.

          The file mtune normally resides in /etc/conf/cf.d.  However,
          a  user  or an add-on package should never directly edit the
          mtune file  to  change  the  setting  of  a  system  tunable
          parameter.   Instead  the  idtune  command should be used to
          modify or append the tunable parameter to the stune file.

          In order for the new values to become  effective,  the  UNIX
          system  kernel  must  be rebuilt and the system must then be
          rebooted.


     See Also
          stune(F), idbuild(ADM), idtune(ADM)


     (printed 8/23/89)                                  MTUNE(F)