Performance Dynamics Company
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Performance Dynamics, a California registered company, was founded in 1994 to provide consulting and educational services for the management of high performance computer systems with an emphasis on performance analysis and enterprise-wide capacity planning. Performance Dynamics Consulting develops tools for performance analysis and capacity planning, designs marketing strategies based on our exten
10/22/2025
10/20/2025
DR still in progress for AMZN.com itself ... 🧐
10/13/2025
Productivity: If you want to be more productive, go to sleep.
https://www.perfdynamics.com/Manifesto/gcaprules.html .25
Displaying metrics, errors, etc. ... is not the same thing as displaying metric errors.
Simple example. Consider Unix, Linux, macOS 'top' output showing CPU utilization.
1. How it is (old school)
CPU usage: 5.79 %usr, 4.51 %sys, 89.68 %idl
These data are sampling averages.
I'm ignoring the number of significant digits here
https://lnkd.in/gP96NDim
2. How it could be (nay, SHOULD be)
CPU usage: 5.79 ± 0.29 %usr, 4.51 ± 0.23 %sys, 89.68 ± 4.48 %idl
All measurements (data) are wrong ... by definition.
The only question is, can you tolerate the wrongness?
If you're not informed how wrong data is, how can you decide?
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4061 East Castro Valley Boulevard
Castro Valley, CA
94552
