We’ve all been there. It’s 3 a.m., an alert just fired, and you’re staring at a dashboard. The P99 latency is spiking, but the average looks fine. The CPU is high, but the load average is normal. What’s actually going on? The hard truth is that most of our dashboards are subtle liars. They lie by averaging percentiles, hiding the real user pain. They lie with poorly chosen time windows that miss the crucial spike. They lie because we're forced to guess: is this a counter or a gauge? Can I sum this? Is a line graph even the right way to look at this? We expect every engineer on our team to also be a part-time statistician, and at 3 a.m., that’s a recipe for disaster. In this talk, I'll share stories of how misleading dashboards have sent teams down the wrong rabbit hole during critical incidents. We'll dissect the common lies and half-truths our monitoring tells us every day. Then, we'll talk about the alternative: building "opinionated" observability. It's about baking our expertise and best practices directly into our tools, so the right chart appears by default, the alert already has context, and the system guides you to the right questions. This isn't just about making prettier graphs. It's about giving back our most valuable resource time, and letting engineers get back to being engineers, not full-time data analysts. What you'll get from this talk: How to spot the 3 most common ways your dashboards are probably lying to you. A simple mental model for choosing the right visualization for the job (and knowing when a line graph is a terrible choice). Practical ways to start baking your team's expertise and "tribal knowledge" into your monitoring with smart defaults. How to argue for, or build, "opinionated" tools that stop wasting your team's time and lead to faster, more accurate incident response.
Ralph Meijer is a Software Engineer and technical leader with over 20 years of experience building scalable distributed systems, real-time communications platforms, event-driven architectures, and observability solutions. Having served in technical leadership roles across both fast-paced startups and global multinationals, he specializes in connecting complex systems and bridging the gap between engineering teams and cross-functional partners in product, design, and legal. Ralph balances security, reliability, privacy, performance, and maintainability across every stage of system design. Deeply committed to open standards and collaborative engineering, he actively contributes to Open Source communities and serves as Chair of the XMPP Standards Foundation.
