Version 7.4.2

Buffer History

This function can be used to display the Adabas Fastpath buffer history information that has been recorded in the Adabas Fastpath configuration file either

If history logs are present for more than one buffer, selecting option code 3 from the main menu or entering the direct command 3 from the command line displays the following screen:

 10:59:34     ***** A D A B A S  FASTPATH SERVICES 7.4.1 *****         2002-09-05
                             -  Buffer History  -                       F13000MA


                Please mark to select Buffer for History Display

                            _   AFP721A    Global
                            _   SYSCO33    Global



  Command ==>
 Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
       Help        Exit                    Top                           Menu
Buffer History Selection

Mark the buffer for which history information is to be provided. The following Buffer History Available screen appears:

Note:
This is the first screen displayed if history logs exist for only one buffer.

11:06:19    ***** A D A B A S  FASTPATH SERVICES 7.4.1 *****           2002-09-05
            -  Buffer History Available for Global SYSCO33 -            F13100MA

  
      Buffer   <---Logged at--->   <---Direct Access--->  <----Read-ahead----->
  Sel Session  Date        Time      Attempts  Optimized   Attempts  Optimized

  __  42       Jul 19,2002 12:38 E
  __  43       Jul 19,2002 12:55 E
  __  44       Jul 19,2002 15:27 E
  __  45       Jul 19,2002 16:09 E
  __  46       Jul 19,2002 17:08 E
  __  47       Jul 19,2002 17:45 E
  __  48       Jul 19,2002 17:48 E
  __  49       Jul 23,2002 11:07 E        144         97        140         80
  SS  50       Jul 23,2002 12:14          147         51        168         96
  __  50       Jul 23,2002 13:14          193        129        182        104
  SS  50       Jul 24,2002 14:14 E        364        256        360        234
  __  51       Jul 25,2002 14:27 E

  Select using S or an SS pair, Purge using P or a PP pair.
    Position to: Jul 25,2002


  Command ==>
 Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
       Help        Exit              Reset Top   Next                    Menu
Buffer History

This screen displays a line for each log record of the selected (or default) buffer. Each line includes the following information:

Column Description
Sel

The following option codes can be used to process one or more lines (records) of the log:

s: display details for one log record
ss: display the difference in statistics between a pair of log records
p: purge a single log record
pp: purge from the first to the last marked log records
t: display trace counts for one record
tt: display the difference in trace counts between a pair of logs

You must enter the options ss pp tt in pairs. The second element of the pair need not be on the same screen but must be within the same buffer session.

Use PF6 to clear all entries in the Select column.

Buffer Session The buffer session number. Certain operations cannot be performed across sessions.
Logged at Date/Time The date and time the log was recorded.
E M E indicates end-of-job. M indicates a special log request using the function Special Services.
Direct Access Read-Ahead The number of attempted and successful direct access and read-ahead optimizations for each logging period.

Use PF8 to display the next page of log records.

If option code ss is marked for a pair of records, the following History Interval screen appears. This screen displays the statistics for the time interval specified in the screen heading.

11:07:11  ***** A D A B A S  FASTPATH SERVICES 7.4.1 *****            2002-09-05
           History Interval - Jul 23,2002 12:14 to 14:14               F13110MA

   
    Buffer Type: Global    Name: SYSCO33        SVC:  240  DB:  33 
    Connected to:                               Buffer Status : Active
    Started:   Jul 23,2002   at: 11:14          Ave Memory Val: 51
    Address:   099CB000 Size(k): 1024           Session Number: 50

  ------------------------------ Buffer Statistics -----------------------------

        Access Type           Attempts  (46%) <----------Successes  (68%)

        Read-ahead:                360  (23%)                  234  (65%)
        Direct:                    364  (23%)                  256  (70%)
        RCs:                             (0%)                        (0%)
        Excluded:                  865  (54%)

        Total:                   1,589 (100%)                  490  (31%)
 
------------------------------------------------------------------------------


  Command ==>
 Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
       Help        Exit        Next  Excl  Gen   Buff  Parm              Menu
History Interval Logs

The information contained on this screen is exactly like the General Information screen available directly from this screen by pressing PF7. The excluded command analysis, buffer memory and parameter screens can also be invoked by pressing PF6, PF8, and PF9, respectively. All of these screens are described in the section Buffer Information.

If, on the Buffer History screen, you marked a record with an s instead of marking a pair, the following screen will appear displaying the statistics at the time the history log was recorded:

11:07:11  ***** A D A B A S  FASTPATH SERVICES 7.4.1 *****           2002-09-05
          -  Buffer History - Logged Jul 23,2002 12:14   -            F13110MA

   
    Buffer Type: Global    Name: SYSCO33        SVC:  240  DB:  33 
    Connected to:                               Buffer Status : Active
    Started:   Jul 23,2002   at: 11:14          Ave Memory Val: 51
    Address:   099CB000 Size(k): 1024           Session Number: 50

  ------------------------------ Buffer Statistics -----------------------------

        Access Type           Attempts  (13%) <----------Successes  (46%)

        Read-ahead:                168   (7%)                   96  (57%)
        Direct:                    147   (6%)                   51  (34%)
        RCs:                             (0%)                        (0%)
        Excluded:                  865  (87%)

        Total:                   1,865 (100%)                  147   (6%)
 
------------------------------------------------------------------------------



  Command ==>
 Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
       Help        Exit        Next  Excl  Gen   Buff  Parm              Menu
Buffer History

This screen displays the details for a single log record. PF keys can be used to display the next sequential log record until the end of session is found:

PF Key Displays...
PF5 Next The statistics from the current log record.
PF10 Next The difference between the current and previous log records. The effect of this function varies depending on the type of information being displayed. This key can be used to skip from one statistics time slice to the next showing the statistics achieved in that time slice (taking the difference between one time slice and the next rather than simply displaying the details of each time slice).

Other PF keys provide direct access to the Excluded Command Analysis, General Information, Buffer Memory, and Parameter screens, which are described in the Buffer Information section.

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