HP OpenVMS Systems

OpenVMS Performance Tuning?

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The Question is:

 
We run a large OpenVMS cluster, and use RMS
files that are accessed by many (>5000)
processes concurrently.
 
It is argued variously that:
 
1. A product like Oracle handles this more
efficiently than does RMS
 
2. It would be better to have a few server
processes directly accessing the files
 
3. The Lock Manager has too much overhead to
allow us the throughput that we need, and that
we should bypass it, letting the server
processes manage concurrent access through
some other approach.
 
I realize that this is pretty vague, but I do
not know where to find info to address these
kind of issues, in particular, some reference
that compares RMS performance to that of
commercial DBs.
 

The Answer is :

 
  Performance information depends entirely on the precise nature of your
  particular application, rather than the experiences of others.
 
  Start with the guidelines set forth in the OpenVMS Guide to Performance
  Management manual, and work from there.
 
  You should make use of the available performance monitoring tools to
  determine where the time is being spent and whether an alternate approach
  might even affect that -- the essence of tuning is locating the specific
  bottleneck and removing it.  One common and obvious source of performance
  bottlenecks can be the application designl.
 
  Considering the cost of of reprogramming an application, another
  alternative might be hardware reconfiguration.
 

  

     

     
answer written or last revised on ( 7-APR-1999 )
     
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