Alter=(Name=cachename,option(, ...))

    Specifies the action to take on the named cache. You must
    specify the cache name and at least one other option. The /Alter
    qualifier may be specified multiple times on the command line.
    Each /Alter qualifier specified operates on one unique cache
    if no wildcard character (% or *) is specified. Otherwise, each
    /Alter operates on all matching cache names.

    o  Name=cachename

       Name of the cache to be modified. The cache must already be
       defined in the database. You must specify the cache name
       if you use the Alter qualifier. This parameter accepts the
       wildcard characters asterisk (*) and percent sign (%).

    o  Backing_Store_Location=devdir

       Specifies the name of the cache-specific default directory to
       which row cache backing file information is written for the
       specified cache. The database system generates a file name
       (row-cache-name.rdc) automatically for each row cache backing
       file it creates when the RCS process starts. Specify a device
       name and directory name; do not include a file specification.
       By default, the location is the directory of the database
       root file unless a database-specific default directory or a
       cache-specific default directory has been set.

    o  NoBacking_Store_Location

       Specifies that there is no cache-specific default directory
       to which row cache backing file information is written for the
       specified cache.

    o  Drop

       Specifies that the indicated row cache is to be dropped
       (deleted) from the database.

    o  Shared_Memory=keyword

       Specifies the shared memory type and parameters for the cache.
       Valid keywords are:

       -  Type=option

          Specify one of the following options:

          *  Process

             Specifies traditional shared memory global section,
             which means that the database global section is located
             in process (P0) address space and may be paged from the
             process working set as needed.

          *  Resident

             Specifies that the database global section is memory
             resident in process (P0) address space using shared
             page tables. This means that the global section is fully
             resident, or pinned, in memory, and uses less physical
             and virtual memory (for process page tables) than a
             traditional shared memory global section.

       -  Rad_Hint=n
          NoRad_Hint

          Indicates a request that memory should be allocated from
          the specified OpenVMS Resource Affinity Domain (RAD). This
          keyword specifies a hint to Oracle Rdb and OpenVMS about
          where memory should be physically allocated. It is possible
          that if the requested memory is not available, it will be
          allocated from other RADs in the system. For systems that
          do not support RADs, no Rad_Hint specification is valid.

          The Rad_Hint keyword is valid only when the shared memory
          type is set to Resident. If you set the shared memory type
          to System or Process, you disable any previously defined
          RAD hint.

          Use Norad_Hint to disable the RAD hint.

    o  Slot_Count=n

       Specifies the number of slots in the cache.

    o  Slot_Size=n

       Specifies the size (in bytes) of each slot in the cache.

    o  Snapshot_Slot_Count=n

       Specifies the number of snapshot slots in the cache. A value
       of zero disables the snapshot portion for the specified cache.

    o  Sweep_Interval=n

       Specifies the periodic cache sweep timer interval in seconds.
       Valid values are from 1 to 3600.

    o  NoSweep_Interval

       Disables the periodic cache sweep timer interval.

    o  Working_Set_Count=n

       Specifies the number of working set entries for the cache.
       Valid values are from 1 to 100.