RE: Performance tuning suggestions

[Neil Palmer <npalmer@xxxxxxxxxxx>]

For those not running V3R7or V4Rx here's an example of the screen from
WRKSHRPOOL (F11)  that Al is referring to (fixed font):

                             Work with Shared Pools                 
                                                             System:
NTBLOWS
 Main storage size (K)  . :       131072                            
                                                                    
 Type changes (if allowed), press Enter.                            
                                                                    
                       -----Size %-----  -----Faults/Second-----    
 Pool        Priority  Minimum  Maximum  Minimum  Job    Maximum    
 *MACHINE         1     24.22    45.00    10.00     .00   10.00     
 *BASE            1      7.81    80.00     5.00     .50     200     
 *INTERACT        2      5.00    75.00    10.00    2.00     100     
 *SPOOL           3       .76     5.00     5.00    1.00     100     
 *SHRPOOL1        2      1.00      100    10.00    2.00     100     
 *SHRPOOL2        2      1.00      100    10.00    2.00     100     
 *SHRPOOL3        2      1.00      100    10.00    2.00     100     
 *SHRPOOL4        2      1.00      100    10.00    2.00     100     
 *SHRPOOL5        2      1.00      100    10.00    2.00     100     
 *SHRPOOL6        2      1.00      100    10.00    2.00     100     
  
Also, in a previous post someone claimed that QPFRADJ tuning only made
changes every 15 minutes.
Well, that may have been the case back in V1.  I believe the correct
time interval now is every 20 seconds.


I agree with Al - I think QPFRADJ has gained a bad reputation that in
many cases is now no longer deserved.

Neil Palmer                                AS/400~~~~~      
NxTrend Technology - Canada   ____________          ___  ~     
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> -----Original Message-----
> From: Al Barsa, Jr. [SMTP:barsa2@ibm.net]
> Sent: Sunday, February 22, 1998 2:51 PM
> To:   MIDRANGE-L@midrange.com
> Subject:      Re: Performance tuning suggestions
> 
> At 11:53 PM 2/21/98 -0500, you wrote:
> >>Spankedy, spank!  Yes, performance opinions are like (well, you
> know) and
> >>others will probably disagree (although the latter seem to always
> have a
> >>maxed-out system) _HOWEVER_, I _STRONGLY DISAGREE_ with setting any
> value
> for
> >>QPFRADJ other than ZERO (zip, null, nada) for a 9406 system.
> >
> >>Dean Asmussen
> 
> Sorry Dean.  I strongly disagree.  If your system is adequately sized
> (and
> with the recently announced price/performance of the new models,
> there's no
> excuse for an undersized system anymore).  QPFRADJ should be set to 3.
> Note however, when doing an upgrade (CPU, CISC to RISC, or adding
> memory),
> you must change it to 2 for the first IPL.
> 
> I have systems as small as a D10 and as large as the largest 650 in
> the
> world that work well with this set to 3.  BTW, the the latest
> announcements, every RISC AS/400 currently being sold is a 9406,
> except for
> the model 150 which is a 9401.
> 
> This is a controversal point.  You may not realize it, but IBM is
> improving
> autp tuning with every release!  If you haven't looked recently, do a
> WRKSHRPOOL command, and then do an F11!
> 
> Give it a try.
> 
> Al
> 
> 
> 
> Al Barsa, Jr. - Account for Midrange-L
> 
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