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Hello Mogens,
My name is called danisHment by many foreigners. But, I'm not from Denmark.
The names mentioned in your email and some others have done revolutionary
things in Oracle tuning. They are unforgettable names. Although there are
some measurement errors in YAPP, it is a revolution for Oracle tuning.
A senior director in Oracle development emailed me that Oracle would
implement some new features mentioned in DRPP. I don't know the the level
of tree-depth of Oracle's implementation. I'm offering all possible
levels (6 levels) in DRPP.
As a result, performance problem analysis will not be a problem (about
100% accuarcy) with next versions of Oracle. Perhaps, tuning analysis will
disappear. It may seem not so nice for DBAs. But this is the reality.
I think, prediction of performance will be pre-dominately talked in
the future. This is more human based.
regards...
Mogens Nørgaard wrote:
Hello Danisment (if only you had the extra h in there,
it would be DanishMent which would be really cool :) ) -
Sounds interesting. The YAPP formula (R = S + W) is of course not totally
correct (wait time for the run queue, etc.) but seems to be a fair approximation.
And it sure beats the checklist tuning approach (let's try this, then this,
than that and finally this). May I suggest that you let Anjo, Cary, Bjorn
and Steve review your paper, too?
Best regards,
Mogens
Danisment Gazi Unal (Unal Bilisim) wrote:
Hello
Mogens and others,
Yes,
You are right. But the current time based performance techniques still
include errors. Prior to 80's(when I was a child), yes, ratio based measurements
were the method. Then, wait-event based profiling appeared. In fact, this
was an adaptation of Response Time Performance Profiling to Oracle. Unfortunately,
there are significant errors in current response time based performance
profilings. I've been working on a new performance profiling for 1 year.
and now, I've almost completed my paper. The name is Deductive Response-time
Performance Profiling (DRPP). It'll be available on my site after my seminar
in Turkey. You can see the contents at http://www.unal-bilisim.com/resources/drpp_seminar.html
.
Also,
Thanks to Jonathan Lewis, K Gopalakrishnan, and Tim Gorman for reviewing
this paper for 1 year.
regards...
Mogens Nørgaard wrote:
Commit; :-)
In my opinion, you shouldn't spend your money on buying the Niemich
book. It's full of errors (increase the buffer cache hit ratio, for instance)
and the wrong approach (no time-based measurement method, just checklist
after checklist).
Buy 101 by Gaja. Then buy Tom Kyte's One-On-One book for general fantastic
advise on anything. Then go to oraperf.com (Anjo), hotsos.com (Millsap),
ixora.com.au (Steve Adams) and Jonathan Lewis' website (can never remember
the adresse). Or go to MiracleAS.dk and find all these links, including
the book links.
Mogens
Miracle A/S
Denmark
Farnsworth, Dave wrote:
Binay,
I totally agree with this recommendation from Jared for a tuning book. Read the first three chapters, stop and re-read them. And if you play your cards right you can even get a question answered by an author on this list. Cool, eh.
Dave
-----Original Message-----
Sent: Tuesday, January 29, 2002 3:05 PM
To: Multiple recipients of list ORACLE-L
Start with 'Oracle Performance Tuning 101', available at an amazon.com near you.
Jared
On Tuesday 29 January 2002 09:10, BINAY.KUMAR_at_ponl.com wrote:
Hi Everyone
Can anyone suggest me some very good book on Oracle Tunning.
Please only
mention those books which you think is really worth purchasing
Binay Kumar
Oracle Cerified DBA
London
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-- Danisment Gazi Unal http://www.unal-bilisim.comReceived on Sat Feb 02 2002 - 05:44:12 CST
-- Danisment Gazi Unal http://www.unal-bilisim.com