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Oracle® Database Reference
11g Release 2 (11.2)

E40402-11
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V$PARAMETER

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

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(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.

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
UPDATE_COMMENT VARCHAR2(255) Comments associated with the most recent update
HASH NUMBER Hash value for the parameter name