Performance Dynamics Company
Welcome to Performance Dynamics enterprise scale computer performance and capacity planning services
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
02/22/2026
Does the LLM efficient-compute frontier represent new physics? — Instantons in the machine https://speakerdeck.com/drqz/does-the-efficient-compute-frontier-represent-new-physics
11/12/2025
In the vein of: The cloud is the new mainframe and Charge-back is back, baby!
https://speakerdeck.com/drqz/how-to-scale-in-the-cloud-chargeback-is-back-baby
just launched 'Instance Explorer': a simple way to search & compare running instances (including forgotten ones) on AWS, Azure & GCP https://www.linkedin.com/feed/update/urn:li:activity:7394024965781762048/
💸 “Am I overpaying for this instance?” Definitely in the Top 10 most overheard comments in cloud engineering teams, right between “Who spun this up?” and “Do we still need this?”. Now there’s a… | Joe Hefferan 💸 “Am I overpaying for this instance?” Definitely in the Top 10 most overheard comments in cloud engineering teams, right between “Who spun this up?” and “Do we still need this?”. Now there’s a free tool to actually answer that - built by Datadog. We just launched Instance Explorer:...
10/23/2025
Ordinary AI output requires extraordinary human verification. (Apologies to C. Sagan)
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
10/05/2025
Some performance consequences often overlooked in redundancy plans
https://perfdynamics.blogspot.com/2014/03/performance-of-n1-redundancy.html
09/18/2025
Out of The Queue Comes ... Amdahl’s Law! https://www.perfdynamics.com/Papers/amdsynq.pdf
08/22/2025
A clue for remembering all THREE of Little's laws, due to Guerrilla grad Jeffery Pickett
See https://perfdynamics.blogspot.com/2016/10/a-clue-for-remembering-littles-law.html to find out the meaning of Q, L, U, and R, W, S.
08/08/2025
RIP James Lovell, commander of Apollo 13 (played by Tom Hanks in the movie of the same name), has died at age 97.
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