mtune(F)                        19 June 1992                        mtune(F)


 Name

    mtune - tunable parameter file

 Description

    /etc/conf/cf.d/mtune 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 configura-
        tion 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 configura-
        tion 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(ADM) or con-
    figure(ADM) commands 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

    configure(ADM), idbuild(ADM), idtune(ADM) stune(F)