VLFDATA STORAGE subcommand output

This report provides information about the storage management of VLF data spaces. If VLFDATA STORAGE(sclass) is specified, the report shows storage management information only for the sclass.

Figure 1. Example: VLFDATA STORAGE subcommand output (part 1 of 1)

*** ***    FORMAT DUMP OF VLF DATA    *** ***
BLS18077I VLFDATA processing may not be valid for a VIRTUAL dump



    VIRTUAL LOOKASIDE FACILITY (VLF)

    VLF ADDRESS SPACE = ASID(X'000B')


 ********************************************************************
 *                                                                  *
 *                       VLF Storage Report                         *
 *                                                                  *
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    Class: CLASS2

    Messages:
    No errors detected


    Class:    CLASS1
    Control data space:    CCLASS1
    Managed address range
      Start address:                                  X'00001000'
      End address:                                    X'7FFFFFFF'


    Number of pages initially reserved for control:         1024
    Number of pages in use for control:                       19

    Number of available areas:                                 1
    Largest available area:                           2143014912
    Total available area:                             2143014912


    User control:

      Pool 2
        Cell size:                        64
        Primary count:                   128
        Secondary count:                 128
        Number of extents:                 1
        Cells in use:                      1

    Minor control:

      Pool 1
        Cell size:                        48
        Primary count:                   256
        Secondary count:                 170
        Number of extents:                 1
        Cells in use:                     25

Figure 2. Example: VLFDATA STORAGE subcommand output (part 2 of 2)

      Pool 2
        Cell size:                      1024
        Primary count:                   200
        Secondary count:                 100
        Number of extents:                 1
        Cells in use:                     20

      Pool 3
        Cell size:                        32
        Primary count:                   256
        Secondary count:                 128
        Number of extents:                 1
        Cells in use:                     20


    Object control:

      Pool 1
        Cell size:                        40
        Primary count:                   307
        Secondary count:                 204
        Number of extents:                 1
        Cells in use:                     35

    Messages:
    No errors detected


    Class: IKJEXEC

    Messages:
    COF11000I Report may be incomplete due to unavailable data.


*** ***    END OF VLF DATA    *** ***

The following information appears in this report:

CLASS: The name of a VLF class. (An A-I prefix indicates an IBM-supplied class.)

Control data space: The name of the data space used by the VLF class. Each name is comprised of a prefix followed by the class name. The prefix is one of the following values:

C - Contains the control data for the class.
D - Contains the user objects for the class.

Managed address range: These are the range of addresses in the data space which are available for use by VLF. The following values are shown:

Start address - The lowest valid address.
End address - The highest valid address.

Number of pages initially reserved for control: The number of pages reserved at the time the class was defined.

Number of pages in use for control: The number of pages in the data space that are currently being used for control information.

Number of available areas: The number of available areas in the data space.

Largest available area: The size of the largest available area, in bytes, in the data space.

Total available area: The total amount of available storage, in bytes, in the data space.

User control, minor control, and object control: Information about the management of cell pools used for user, minor, and object data:

Cell Size - The size of each cell in the pool in bytes.
Primary Count - The number of cells in the first pool extent.
Secondary Count - The number of cells in each of the other pool extents that have been added.
Number of Extents - The total number of extents currently in the pool.
Cells in Use - The total number of cells currently in use in the pool.