Version 8.2.2

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:

10:22:42     ***** A D A B A S   FASTPATH SERVICES 8.2.2 *****      2010-10-25
                          -  Buffer History  -                       F13000MA  
                                                                               
                                                                               
               Please mark to select Buffer for History Display                
                                                                               
                           _   AFP17004   Global                               
                           _   A8P17004   Global                               
                           _   A8P17013   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.

10:24:38     ***** A D A B A S   FASTPATH SERVICES 8.2.2 *****      2010-10-25
              -  Buffer History Available for Global A8P17004  -     F13100MA  
                                                                               
       Buffer   <---Logged at--->    <-------------Optimization--------------->
 Sel   Session  Date        Time                        Attempts      Optimized
                                                                               
 __  104        Oct 18,2010 13:37    Direct-access           105             90
                                        Read-ahead                             
 __  104        Oct 18,2010 14:37    Direct-access           105             90
                                        Read-ahead                             
 __  104        Oct 18,2010 15:14 E  Direct-access          1039            593
                                        Read-ahead           462            322
 __  105        Oct 18,2010 15:17 E  Direct-access                             
                                        Read-ahead             5              2
 __  106        Oct 18,2010 16:17    Direct-access                             
                                        Read-ahead             6              2
 __  106        Oct 18,2010 17:17    Direct-access                             
                                        Read-ahead             6              2
 Select using S or an SS pair, Purge using P or a PP pair.                     
   Position to: Oct 18,2010                                                    
                                                                               
 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 two-line summary for each log record of the selected (or default) buffer. The summary 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

You must enter the options ss pp 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 The number of attempted and successful direct access optimizations for each logging period.
Read-Ahead The number of attempted and successful 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.

16:24:40     ***** A D A B A S   FASTPATH SERVICES 8.2.2 *****      2012-03-07 
 History Interval -         Jan 13,2012 14:34 to 15:06                 F13110MA 
                                                                                
   Name: A8P17004                              SVC:  254  DB:  17004            
   Dataspace:                                  Buffer Status : Buffer Stopped   
   Started:   Jan 13,2012   at: 12:34          Ave Memory Val: 1245             
   Address:   00001000 Size(k): 1023           Session Number: 2785             
                                                                                
 ------------------------------ Buffer Statistics ----------------------------- 
                                                                                
    Access Type               Attempts  (98%)    <----------Successes  (99%)    
                                                                                
    Read-ahead:                     13   (0%)                       7  (53%)    
    Direct:                     54,816  (98%)                  54,797  (99%)    
    RCs:                             1   (0%)                       1   (0%)    
    Others:                        594   (2%)                                   
                                                                                
    Total:                      55,424 (100%)                  54,805  (98%)    
 ------------------------------------------------------------------------------ 
                                                                                
                                                                                
 Command ==>                                                                    
                                                                                
                                                                                
                                                                                
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12--- 
      Help        Exit              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:

16:25:31     ***** A D A B A S   FASTPATH SERVICES 8.2.2 *****      2012-03-07
 Buffer History - Logged    Jan 13,2012 17:32                          F13110MA
                                                                               
   Name: A8P17004                              SVC:  254  DB:  17004           
   Dataspace:                                  Buffer Status : Active          
   Started:   Jan 13,2012   at: 16:32          Ave Memory Val:                 
   Address:   00001000 Size(k): 1023           Session Number: 2787            
                                                                               
 ------------------------------ Buffer Statistics -----------------------------
                                                                               
    Access Type               Attempts   (4%)    <----------Successes  (45%)   
                                                                               
    Read-ahead:                     22   (2%)                      12  (54%)   
    Direct:                         20   (2%)                       5  (25%)   
    RCs:                             4   (0%)                       4  (20%)   
    Others:                        722  (96%)                                  
                                                                               
    Total:                         768 (100%)                      21   (2%)   
 ------------------------------------------------------------------------------
                                                                               
                                                                               
 Command ==>                                                                   
                                                                               
                                                                               
                                                                               
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
      Help        Exit        Next  Excl  Gen   Buff  Parm  ZNext       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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