mtune(4)                         UNIX System V                         mtune(4)


NAME
      mtune - file format.

SYNOPSIS
      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(4).

      idbuild(1m), idtune(1m) in the User's/System Administrator's Reference
      Manual.











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