HP OpenVMS Systems

OpenVMS Performance Tuning? (Quantum)

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The Question is:

 
Here's a performance tuning question:
Quantum is the amount of time a process is allowed to run on the CPU.  Is there
 a way to measure the number of times quantum is reached?  It seems that if you
 have very CPU intensive processes running that reach quantum regularly, you
 could increase the v
alue of quantum, thus eliminating excessive overhead caused by loading and
 unloading the context of each process as it enters and leaves (then possibly
 re-enters) the CPU.
 
Are there any popular theories on valuing quantum or methods to determine
 whether a system has improved/declined in performance when
 increasing/decreasing quantum?
 

The Answer is :

 
  OpenVMS process scheduling deals (automatically) with quantum end
  processing, and the scheduler will cause the current process to
  continue (without swapping the process context) when it is the best
  candidate.
 

  

     

     
answer written or last revised on ( 23-MAY-2000 )
     
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