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Oracle9i Database Reference
Release 2 (9.2)

Part Number A96536-02
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V$SYSTEM_PARAMETER

V$SYSTEM_PARAMETER displays information about the initialization parameters that are currently in effect for the instance. A new session inherits parameter values from the instance-wide values.

Column Datatype Description

NUM

NUMBER

Parameter number

NAME

VARCHAR2(64)

Name of the parameter

TYPE

NUMBER

Parameter type:

  • 1 - Boolean
  • 2 - String
  • 3 - Integer
  • 4 - Parameter file
  • 5 - Reserved
  • 6 - Big integer

VALUE

VARCHAR2(512)

Instance-wide parameter value

ISDEFAULT

VARCHAR2(9)

Indicates whether the parameter is set to the default value (TRUE) or the parameter value was specified in the parameter file (FALSE)

ISSES_MODIFIABLE

VARCHAR2(5)

Indicates whether the parameter can be changed with ALTER SESSION (TRUE) or not (FALSE)

ISSYS_MODIFIABLE

VARCHAR2(9)

Indicates whether the parameter can be changed with ALTER SYSTEM and when the change takes effect:

  • IMMEDIATE - Parameter can be changed with ALTER SYSTEM regardless of the type of parameter file used to start the instance. The change takes effect immediately.
  • DEFERRED - Parameter can be changed with ALTER SYSTEM regardless of the type of parameter file used to start the instance. The change takes effect in subsequent sessions.
  • FALSE - Parameter cannot be changed with ALTER SYSTEM unless a server parameter file was used to start the instance. The change takes effect in subsequent instances.

ISMODIFIED

VARCHAR2(8)

Indicates how the parameter was modified. If an ALTER SYSTEM was performed, the value will be MODIFIED.

ISADJUSTED

VARCHAR2(5)

Indicates whether Oracle adjusted the input value to a more suitable value (for example, the parameter value should be prime, but the user input a non-prime number, so Oracle adjusted the value to the next prime number)

DESCRIPTION

VARCHAR2(64)

Description of the parameter

UPDATE_COMMENT

VARCHAR2(255)

Comments associated with the most recent update