File Server Statistics

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# File Server Statistics

If a file server has been installed, the file server statistics part of the Natural Tools for Db2 is used to display statistics on the use of the file server.

To invoke the File Server Statistics function

- On the Natural Tools for Db2 Main Menu, enter function code `F` and press ENTER

  The File Server - Generation Statistics screen is displayed:

        16:53:20              ***** NATURAL TOOLS FOR DB2 *****             2009-10-30
                            - File Server - Generation Statistics -

          File Server Dataset Name ......: SAG.N2122.FSERV

          Enqueue Resource Name .........: FSERVV609

          Total Number of File Server Blocks ..........: 1000

          File Server Block Size ......................: 4080

          Number of Space Map Blocks ..................: 2

          Number of Global Directory Blocks ...........: 1
                                     Entries ..........: 203
          User Space Allocation Quantities Primary ....: 50
                                           Secondary ..: 10
          Total Number of Blocks permitted per User ...: 200

        Command ===>
        Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
              Help        Exit                                Dire        Next  Canc

  This screen provides information on parameters that must be specified when generating the file server.

  If the file server storage medium is the Software AG Editor buffer pool, the File Server - Generation Statistics screen looks as follows:

        16:53:20              ***** NATURAL TOOLS FOR DB2 *****             2009-10-30
                            - File Server - Generation Statistics -

          File Server Dataset Name ......: STORAGE MEDIUM IS EDITOR BUFFER POOL

          Enqueue Resource Name .........:

          Total Number of File Server Blocks ..........: 0

          File Server Block Size ......................: 4088

          Number of Space Map Blocks ..................: 0

          Number of Global Directory Blocks ...........: 0
                                     Entries ..........: 0
          User Space Allocation Quantities Primary ....: 20
                                           Secondary ..: 10
          Total Number of Blocks permitted per User ...: 100

        Command ===>
        Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
              Help        Exit                                            Next  Canc

  If you press PF11 (Next), a second screen is displayed, the File Server - User Statistics screen, showing statistics that have been kept since the file server was installed - Statistics since Generation -, and statistics about the current Natural session - Current Session Statistics.

        16:53:20              ***** NATURAL TOOLS FOR DB2 *****             2009-10-30
                               - File Server - User Statistics -

            Statistics since Generation:

           Active Users - Maximum Number: 3          Current Number: 1
           Maximum Number of used Blocks for single User ..........: 200
                                         for all Users ............: 200
           Number of Block Allocations PRIMARY ....................: 13
                                       SECONDARY ..................: 17
           Number of free Blocks ..................................: 997
           Number of INIT SESSION Calls ...........................: 65

            Current Session Statistics:

           Total Number of Blocks .................. ...: 0
                           Free Blocks .................: 0
                           Secondary  Allocations ......: 0
           VSAM I/O Buffer inside DB2AREA ........... ..: YES   (Yes/No)

        Command ===>
        Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
              Help        Exit                                Dire  Prev        Canc

  If you press PF10 (Prev), you are returned to the File Server - Generation Statistics screen.

  Statistics are updated, each time you press ENTER, PF10, or PF11.

  If the file server storage medium is the Software AG Editor buffer pool, the File Server - User Statistics screen looks as follows:

        16:53:20              ***** NATURAL TOOLS FOR DB2 *****             2009-10-30
                               - File Server - User Statistics -

           Statistics since Generation:

           Active Users - Maximum Number: 3          Current Number: 0
           Maximum Number of used Blocks for single User ..........: 0
                                         for all Users ............: 0
           Number of Block Allocations PRIMARY ....................: 0
                                       SECONDARY ..................: 0
           Number of free Blocks ..................................: 0
           Number of INIT SESSION Calls ...........................: 0

           Current Session Statistics:

           Total Number of Blocks .................. ...: 20
                           Free Blocks .................: 20
                           Secondary  Allocations ......: 0
           VSAM I/O Buffer inside DB2AREA ........... ..: YES   (Yes/No)

        Command ===>
        Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
              Help        Exit                                      Prev        Canc

  Note that the section Statistics since Generation could not be provided by this display.

  For file server VSAM files, Natural for Db2 also provides file server directory display and maintenance.

  If you press PF9 (Dire), the active directory entries are listed showing the session identifiers and their allocated file server blocks. The display looks like the following:

      12:47:40              ***** NATURAL TOOLS FOR DB2 *****             2009-11-03
      User XYZ             - File Server - Directory Entries -        TID TCD4

      C  No  Tpsessid Birth       1st Block Last Block     Blocks Comment
      ------------------------------------------------------------------------------
      _    0 Free Chn                   826        964        597 Checked
      _    1 TCKK     pre NDB43         902        951         50 Checked
      _    2 TCLB     pre NDB43          50         99         50 Checked
      _    3 TCR0     pre NDB43         301        250         50 Checked
      _    4 TCR7     pre NDB43         251        350         50 Checked
      _    5 TCDW     pre NDB43         604        503         50 Checked
      _    6 TCEX     pre NDB43         504        653         50 Checked
      _    7 TCBW     2009-09-25        957        374         50 Checked
      _    8 TC42     2009-10-15        357        993         50 Checked
      _    9 - free -                     0          0          0 Empty Chain
      _   10 - free -                     0          0          0 Empty Chain

      Command ===>
      Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
      Cont  Help        Exit  List  Pos   --    -     +     ++    Delet Fresh Canc

  Birth denotes a rough creation date of the file server session, if it was created by Natural for Db2 Version 4.3. If the file server session was created by an earlier version of Natural for Db2, the birthday of the file server session appears as `pre NDB43`.

  The Directory Entries screen provides the functionality to scroll through the directory entries and to position a particular entry to the top of the screen.

  In addition, Directory Entries allows you to list all file server block numbers of a directory entry (PF4, line command `L`) or to delete a directory entry from the file server (PF10, line command `D`). You should only delete directory entries, if you are sure the associated Natural session is no longer alive, otherwise the deletion could destroy the file server structure.

  Directory Entries reflects the file server sessions at one particular point in time. By pressing PF11, the display will be refreshed from the file at another (actual) point in time.