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All Things P99

The event for developers who care about P99 percentiles and high-performance, low-latency applications

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Performance Insights Beyond P99: Tales from the Long Tail

Beyond the P99” moments are the rare, unpredictable outliers that disproportionately affect performance, reliability, and user experience. In this session, Rachel Stephens of RedMonk sits down with engineering leader Adrian Cockcroft to explore what really happens past the 99th percentile. From his early work on embedded systems to chaos engineering at Netflix to building modern AI-assisted analytics, Adrian shares decades of lessons on how to uncover, understand, and fix the long tail of system behavior.

36 minutes
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Rachel Stephens Featured Speaker P99 CONF 2025

Rachel Stephens, Research Director at Red Monk

Rachel Stephens is a Research Director with RedMonk and has been with the firm since 2016. Rachel comes to RedMonk with a wealth of financial experience, and she applies this quantitative lens to her analysis. Her focus is broad (as it is for all of the RedMonk analysts), but she devotes a lot of time to emerging growth technologies. Before joining RedMonk, Rachel worked as a database administrator and financial analyst. Rachel holds an MBA with a Business Intelligence certification from Colorado State University and a BA in Finance from the University of Colorado. She is currently based in Denver, Colorado.

Adrian Cockroft, Tech Advisor at Nubank

Adrian Cockroft is a Tech Advisor at Nubank.