mtune(4) — Reliant UNIX 5.44c4

mtune(4)                                                           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 "#defines" 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. In addition to an integer value,
        this field may also contain a formula using other parameter names.
        Formulas may have parentheses, multiplication, division, addition
        and subtraction. Example: (NPROC*10+5). White space is not allowed
        in a formula.

     3. minimum value: This is the minimum allowable value for the tunable
        parameter. If the parameter is set in the stune file, the confi-
        guration 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 confi-
        guration 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 Reliant UNIX Sys-
     tem kernel must be rebuilt and the system must then be rebooted.

SEE ALSO
     idbuild(1M), idtune(1M), stune(4).










Page 1                       Reliant UNIX 5.44                Printed 11/98
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