Re: Heisenberg and measurement intrusion....

That is bogus beyond belief.  The Heisenberg Uncertainty Priciple mainly 
invoved predicting the position of an electron around an atomic nucleus. 
Even a single photon of light (the mechanism of "observing" / measuring 
the electron's position) would radically offset the electron, so you'd 
never  know where it was at before the "measuring" photon hit it.

If the Measurement / Measured relationship is on the scale of Photon / 
Electron, then there's reason to be concerned.  However, realistically, 
the amount of heat extracted from a person's body to expand the mercury in 
a thermometer to measure that person's temperature introduces no error in 
the measured temperature.

Unless your database monitoring tool is more like a sledgehammer than a 
stethoscope, you're OK.

Of course, that's IMHO.

Jack C. Applewhite - Database Administrator
Austin (Texas) Independent School District
512.414.9715 (wk)  /  512.935.5929 (pager)

 I'll just sit back in the shade while everyone gets laid.
 That's what I call Intelligent Design. -- God ("Origin of Species": Chris 
Smither)




"Ted Coyle" <oracle-l@xxxxxxxxxxxx> 
Sent by: oracle-l-bounce@xxxxxxxxxxxxx
07/31/2007 03:38 PM
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Subject
Heisenberg and measurement intrusion....






I'm on an Oracle performance project and a project participant made a
statement regarding measurement intrusion.

Is the statement below accurate?
"So the Heisenberg uncertainty principle mandates we run without 
monitoring
as a baseline."

I responded with a wikipedia link which I'll send later, but I'd like to 
get
opinions first.  :)

Regards,
Ted

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http://www.freelists.org/webpage/oracle-l

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