[Info-vax] Autogen

[DaveFroble]

John Reagan wrote:
> On Saturday, February 3, 2018 at 7:41:50 AM UTC-5, Marc Van Dyck wrote:
>> Marc Van Dyck wrote on 1/02/2018 :
>>> In the past, memory was scarce, and it was important to maximize its
>>> usage. In order to achieve that, several system parameters, and the
>>> autogen procedure, were invented to tailor the systems to specific
>>> user and application needs.
>>>
>>> Today, memory is cheap and capacity usually not an issue anymore.
>>> Shortages can be much more easily solved by adding memory than tuning
>>> systems. As a consequence, one hears much less often about autogen.com
>>> and modparams.dat.
>>>
>>> So my question : is this procedure still uptodate ? Has it been modified
>>> to take in account the much larger memory capacities that we can see
>>> today (our production systems have 192 GB) ? Can we still trust
>>> the 'optimal' parameter values that it computes ? And should we still
>>> autogen with feedback systems as often as we did in the past ?
>>>
>>> Thank you,
>>> Marc.
>> Thanks for the answers. We have just done what was mentioned, cleaning
>> modparams from all the useless historical stuff. We've compared
>> parameters before and after autogen runs and it did not change much.
>>
>> -- 
>> Marc Van Dyck
> 
> A long-time VMS developer once told me "anybody with a MODPARAMS.DAT longer than 10 lines is either a genius or a fool"

Well, I don't claim the genius part, but going back to VAX I did have some 
MODPARAMS.DAT stuff.  One area was locks, early VAXs were kind of stingy.

Now, I just say, "use the memory as if you didn't pay for it".

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
DFE Ultralights, Inc.
170 Grimplin Road
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