HP OpenVMS Systems

AUTOGEN and use of FEEDBACK?

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The Question is:

 
I have questions about AUTOGEN. I wish to know about the relationship of
AGEN$FEEDBACK.DAT and AGEN$ADDHISTORY.DAT.
 
Follow on of the above question, please verify whether my thinking is
corrent or not:
 
If (want_to_take_into_a/c_of_the_running_system's_loading_since_bootup)
then
        @autogen savparams setparams feedback
endif
 
if (want_to_take_into_a/c_of_the_past_feedback_results_only)
then
        @autogen getdata setparams
endif
 
if (do_not_take_into_a/c_of_any_feedback_data)
then
        @autogen getdata setparams nofeedback
endif
 
 

The Answer is :

 
  Please start with:
 
    $ @SYS$UPDATE:AUTOGEN HELP
 
  You will find several discussions of the use of FEEDBACK and NOFEEDBACK
  there, including the following two sections:
 
   AUTOGEN feedback minimizes the need for you to modify parameter
   values or system file sizes. Feedback allows AUTOGEN to
   automatically size the operating system based on your actual work
   load. Sizing is the process of matching the allocation of system
   resources (memory and disk space) with the workload requirements
   of your site.
 
   Feedback is information, which is continuously collected by the
   operating system executive, about how various resources are used
   by the system's work load. This information is collected when
   exception events occur and does not affect system performance.
 
   You control how AUTOGEN uses feedback by specifying an execution
   mode when you invoke AUTOGEN. When run in feedback mode, AUTOGEN
   analyzes this information and adjusts any related parameter
   values.
 
   AUTOGEN collects feedback during the SAVPARAMS phase by executing
   the image SYS$SYSTEM:AGEN$FEEDBACK.EXE. AUTOGEN writes feedback
   information to the file SYS$SYSTEM:AGEN$FEEDBACK.DAT. This file
   is then read during the GETDATA phase.
 
	...
 
   FEEDBACK      Specifies that AUTOGEN run in feedback mode, using
                 dynamic feedback collected during the SAVPARAMS
                 phase to make its calculations.
   NOFEEDBACK    Specifies that AUTOGEN not use feedback in the
                 calculations. The feedback from the SAVPARAMS
                 phase is ignored. Use NOFEEDBACK mode for the
                 initial system installation or upgrade. NOFEEDBACK
                 supersedes the execution mode option INITIAL, which
                 was used in a previous version of the operating
                 system.
 
  If you wish to use the feedback data in your calculations, please
  specify the FEEDBACK parameter on the AUTOGEN command.
 
  The specific internal operations and various internal files used within
  AUTOGEN are not supported interfaces, and are subject to change without
  notice.
 
  If you wish to know the specific operations of AUTOGEN, the Wizard
  would recommend acquiring an OpenVMS source listings CD-ROM kit,
  and examining the (commented) version of AUTOGEN available there.
 

  

     

     
answer written or last revised on ( 2-NOV-1998 )
     
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