Tuning Format of Tunable Parameters Descriptions
This section describes the format for tuning Oracle Solaris parameters.
- Parameter
-
The exact name of the tunable.
Some parameters use the naming convention module:parameter to indicate that the parameter belongs to a loadable module. For example,
tmpfs:tmpfs_maxkmem
means thattmpfs_maxkmem
is a parameter of thetmpfs
module. - Description
-
Briefly describes what the parameter does or controls.
- Data Type
-
Indicates the signed or unsigned short integer or long integer. A long integer is twice the width in bits as an integer. For example, an unsigned integer = 32 bits, an unsigned long integer = 64 bits.
- Units
-
(Optional) Describes the unit type.
- Default
-
Indicates the value that the system uses by default.
- Range
-
Specifies the possible range allowed by system validation or the bounds of the data type.
-
MAXINT – A shorthand description for the maximum value of a signed integer (2,147,483,647)
-
MAXUINT – A shorthand description for the maximum value of an unsigned integer (4,294,967,295)
-
- Dynamic?
-
Indicates whether the parameter can by configured on a running system with the
mdb
orkmdb
debugger (Yes
), or only during boot time initialization (No
). - Validation
-
Checks that the system applies to the value of the variable either as specified in the
/etc/system
file or the default value, as well as when the validation is applied. - Implicit
-
(Optional) Provides unstated constraints that might exist on the parameter, especially in relation to other parameters.
- When to Change
-
Explains why someone might want to change this value. Includes error messages or return codes.
- Zone Configuration
-
Identifies whether the parameter can be set in a exclusive-IP zone or must be set in the global zone. None of the parameters can be set in shared-IP zones.
- Commitment Level
-
Identifies the stability of the interface. Many of the parameters in this manual are still evolving and are classified as unstable. For more information, see the
attributes
(7) man page.