Contributing Writer

Danny Chen

Danny Chen is a member of the Trading Solutions Runtime SRE team at Bloomberg, where there are always interesting vertical scale problems to identify and solve. He has been a UNIX performance engineer for over 40 years. Along the way, he has worked on operating systems, file and database systems, market data, messaging, transaction management and enterprise systems monitoring.

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Application Performance Management/MonitoringDevOps visibilityIT observabilityCPUhardware

Latest from Danny

Application Performance Management/Monitoring

Of Max and Min: The Non-Interference Prime Directive (for Visibility)

Last issue, I cited CPU utilization as an example of a metric that is often misused to describe/explain/infer system performance and asserted that improved visibility can help to overcome such misuse. In this issue, I will expand on what improved visibility means and present two case studies that illustrate a recent antipattern that I’ve noticed […]

Oct 20, 2022 · 3 min

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OCT18

Application Performance Management/Monitoring

Of Max and Min: When Performance Engineering Plans Go Awry

Modern software developers have access to powerful tools and services which allow them to quickly develop, demo and deploy fully functional applications. But what happens when the single-user prototype satisfies all required functionality but the user says the system seems slow? Or if the initial implementation turns out fine for one user, but multiple users […]

3 min