8.110 V$PARAMETER2

V$PARAMETER2 displays information about the initialization parameters that are currently in effect for the session, with each list parameter value appearing as a row in the view. A new session inherits parameter values from the instance-wide values displayed in the V$SYSTEM_PARAMETER2 view.

Presenting the list parameter values in this format enables you to quickly determine the values for a list parameter. For example, if a parameter value is a, b, then the V$PARAMETER view does not tell you if the parameter has two values (both a and b) or one value (a, b). V$PARAMETER2 makes the distinction between the list parameter values clear.

Column Datatype Description

NUM

NUMBER

Parameter number

NAME

VARCHAR2(80)

Name of the parameter

TYPE

NUMBER

Parameter type:

  • 1 - Boolean

  • 2 - String

  • 3 - Integer

  • 4 - Parameter file

  • 5 - Reserved

  • 6 - Big integer

VALUE

VARCHAR2(4000)

Parameter value for the session (if modified within the session); otherwise, the instance-wide parameter value

DISPLAY_VALUE

VARCHAR2(4000)

Parameter value in a user-friendly format. For example, if the VALUE column shows the value 262144 for a big integer parameter, then the DISPLAY_VALUE column will show the value 256K.

ISDEFAULT

VARCHAR2(6)

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.

ISPDB_MODIFIABLE

VARCHAR2(5)

Indicates whether the parameter can be modified inside a PDB (TRUE) or not (FALSE).

In a non-CDB, the value of this column is NULL.

ISINSTANCE_MODIFIABLE

VARCHAR2(5)

For parameters that can be changed with ALTER SYSTEM, indicates whether the value of the parameter can be different for every instance (TRUE) or whether the parameter must have the same value for all Real Application Clusters instances (FALSE). If the ISSYS_MODIFIABLE column is FALSE, then this column is always FALSE.

ISMODIFIED

VARCHAR2(10)

Indicates whether the parameter has been modified after instance startup:

  • MODIFIED - Parameter has been modified with ALTER SESSION

  • SYSTEM_MOD - Parameter has been modified with ALTER SYSTEM (which causes all the currently logged in sessions' values to be modified)

  • FALSE - Parameter has not been modified after instance startup

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)

ISDEPRECATED

VARCHAR2(5)

Indicates whether the parameter has been deprecated (TRUE) or not (FALSE)

ISBASIC

VARCHAR2(5)

Indicates whether the parameter is a basic parameter (TRUE) or not (FALSE)

DESCRIPTION

VARCHAR2(255)

Description of the parameter

ORDINAL

NUMBER

Position (ordinal number) of the parameter value. Useful only for parameters whose values are lists of strings.

UPDATE_COMMENT

VARCHAR2(255)

Comments associated with the most recent update

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data

See Also: