Library /sys$common/syshlp/helplib.hlb  —  RMU72  Set  Global Buffers
    Allows you to control the database global buffers feature without
    requiring that the database be open.

1  –  Description 

    If you move a database from one system to another, or when memory
    usage or system parameters change, you may have to modify the
    global buffer parameters for a database when it is not possible
    to open the database. This situation could occur, for example, if
    you have insufficient available physical or virtual memory.

    The RMU Set Global_Buffers command allows you to alter some
    of the global buffer-related parameters without opening the
    database. This allows you to reconfigure the database so that
    it can be opened and accessed on the system.

2  –  Format 

  (B)0RMU/Set Global_Buffers root-file-spec

  Command Qualifiers                x  Defaults
                                    x
  /Disabled                         x  None
  /Enabled                          x  None
  /Large_Memory={Enabled|Disabled}  x  None
  /Log                              x  None
  /Number=n                         x  None
  /User_Limit=n                     x  None

3  –  Parameters

3.1  –  root-file-spec 

    Specifies the database root file for which you want to modify the
    global buffers feature.

4  –  Command Qualifiers

4.1  –  Disabled 

    Disables global buffers for the specified database.

4.2  –  Enabled 

    Enables global buffers for the specified database.

4.3  –  Large Memory 

    Large_Memory=Enabled
    Large_Memory=Disabled

    Large_Memory=Enabled enables global buffers in large memory
    (VLM).

    Large_Memory=Disabled disables global buffers in large memory
    (VLM).

4.4  –  Log 

    Displays a log message at the completion of the RMU Set Global_
    Buffers command.

4.5  –  Number 

    Number=n

    Sets the number of global buffers.

4.6  –  User Limit 

    User_Limit=n

    Sets the global buffers user limit value.

5  –  Usage Notes 

    o  This command requires exclusive database access (the database
       cannot be open or accessed by other users).

    o  The Enabled and Disabled qualifiers are mutually exclusive.

    o  The Large_Memory=Enabled and Large_Memory=Disabled qualifiers
       are mutually exclusive.

    o  Changes made by the RMU Set Global_Buffers command are not
       journaled. You should make a subsequent full database backup
       to ensure recovery.

    o  When global buffers are set to reside in large memory
       (Large_Memory=Enabled), the process that opens the database
       must be granted the VMS$MEM_RESIDENT_USER rights identifier.
       Oracle Corporation recommends that you use the RMU Open
       command when you utilize this feature.
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