---
title: "Performance Insights Beyond P99: Tales from the Long Tail"
date: 2026-01-06T19:28:21Z
modified: 2026-01-06T19:28:21Z
permalink: "https://redmonk.com/blog/2026/01/06/performance-insights-beyond-p99-tales-from-the-long-tail/"
type: post
status: publish
excerpt: ""
wpid: 4654
categories:
  - Appearances
featured_image: "https://redmonk.com/wp-content/uploads/2026/01/530x370-p99-25-rachel-stephens-adrian-cockroft-redmonk-nu.jpg"
timestamp: 2026-01-06T19:28:21Z
tags:
  - Appearances
---

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.

[On-demand session here](https://www.p99conf.io/session/performance-insights-beyond-p99-tales-from-the-long-tail/) – registration required.