Re: Best course to understand why a bad plan is chosen by optimizer
- From: Mladen Gogala <gogala.mladen@xxxxxxxxx>
- To: "Clay Jackson (cjackson)" <Clay.Jackson@xxxxxxxxx>, "mwf@xxxxxxxx" <mwf@xxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 23 Sep 2019 14:45:23 -0400
Hi Clay!
Comments in line:
On 9/23/19 1:19 PM, Clay Jackson (cjackson) wrote:
I've known Mark for a LONG time, and have ALWAYS been impressed with his elegant
"turn of phrase"!
I have never met Mark in my life and I am deeply sorry about it. I am
following his contributions on various Oracle forums with a sort of
fascination. I respect hist opinion deeply, even when I disagree with him.
I'm going to save this; and, with permission of course, may use it a few talks (I'm
doing one in Dallas in a few weeks on "The Future of the DBA in a World of
Autonomous Databases").
Databases are extremely complex, even if autonomous. I don't envision
being able to utilize a serious business database without having a DBA
anytime soon. Also, databases are getting larger. Backup and recovery of
50+ TB database is not as simple as it may look. Look at the databases
as modern airplanes. No robot can do what Sully Sullenberger has done.
Auto-pilot is available for the long time but I would be very hesitant
to fly an airplane which doesn't have a pilot on board.
I think sometimes we forget the "Engineering" ; and I'm 100% certain my mother was
correct, when, in 1970, she predicted "Cost Accounting will be the ruin of civilization".
With all due respect, I disagree with your mother. Cost accounting is a
necessary evil. You can call me crazy, but I prefer the money to be
spent on my bonus over buying unnecessary software. My bonus is never
unnecessary.
Clay Jackson
Database Solutions Sales Engineer
clay.jackson@xxxxxxxxx
office 949-754-1203 mobile 425-802-9603
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