DLFDATA STORAGE subcommand output

This report provides information about the storage management of DLF data spaces.

If DLFDATA STORAGE(class) is specified, the report shows storage management information only for the class.

Figure 1. Example: DLFDATA STORAGE subcommand output

  BLS18077I DLFDATA processing may not be valid for a VIRTUAL dump

  *** ***    FORMAT DLFDATA    *** ***

     Data Lookaside Facility (DLF)

     DLF address space = ASID(X'000F')

  DLFDATA subcommand

  ****************************************************************
  *                                                              *
  *                     DLF Storage Report                       *
  *                                                              *
  ****************************************************************


      Class: COFGSDO
      Control data space: COFGSDO
      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:                                 2
      Largest available area:                           2143207424
      Total available area:                             2143211456

      User control:

        Pool 1
          Cell size:                        32
          Primary count:                   128
          Secondary count:                 128
          Number of extents:                 1
          Cells in use:                      0

      Object control:

        Pool 1
          Cell size:                       248
          Primary count:                   214
          Secondary count:                 115
          Number of extents:                 1
          Cells in use:                      1

      Messages:
      No errors detected

  *** ***    END OF DLFDATA    *** ***

The following information appears in the report:

CLASS: This is the name of the DLF class. A class name is 7 alphanumeric characters and is specified in a COFDLFxx parmlib member.

Note: COFGSDO is the only valid DLF class.

DATA SPACE: This is the name of the control data space used by the DLF class. The name appears with a prefix of ‘C’ followed by the class name.

ADDRESS RANGE: These are the range of addresses in the data space that are available for use by DLF. The following values are shown:

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

PAGE COUNTS: These are the number of pages of data space storage allocated to control information. The following two counts are shown:

The number of pages reserved at the time the class was defined.
The number of pages in the data space that are currently being used for control information.

AVAILABLE AREAS: These are statistics concerning the available areas of storage in the data space. The following three items are shown:

Available areas - The number of available areas in the data space.
Largest area - The size of the largest available area found in bytes.
Total area - The total amount of available storage found in bytes.

CONTROL INFORMATION: This section contains information about the management of cell pools used for user and object data. For each pool, the following are shown:

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.