Re: SYSTEM TUNING

["R. Bruce Hoffman, Jr" <rbruceh@xxxxxxx>]

-----Original Message-----
From: Christopher J. Devous <cdevous@antigua.com>
To: 'MIDRANGE-L@midrange.com' <MIDRANGE-L@midrange.com>
Date: Wednesday, October 27, 1999 2:13 PM
Subject: RE: SYSTEM TUNING


>> Probably take much longer to do any REAL tuning. Need to monitor system
>over
>> time and evaluate that. Need to understand application mix and usage over
>> time and evaluate that. Need to understand hardware and limitations. Need
>to
>> understand user expectations and manage them. Need to understand
>management
>> expectations and either manage that or get them to ante-up.
>
>All of the above is true.
>
>On our 9406-510, I found the autotuner to be essentially worthless.  We had
>to monitor the various stats and make adjustments over time, as you
>suggest.  The situation on the 310 was the same.
>

Yes, and Version 3 of the tuner was so-so. On large machines with big mixes,
it did not work well.


>Then we migrated to the 9406-720.  My IBM var told me that autotuner worked
>well, so I turned it on.
>
>It has worked so well  that I've set virtually everything to *CALC and
>simply let the system mangage itself
>


And with Version 4 (V4R2 and up) the tuner is really something useful.


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