The Telemetry Tax: Architecting Zero-Allocation Event Observability at 15B+ Daily Event Scale

Throughout my career, observability and monitoring systems have played a very important role in system stability, availability, and scalability when architecting, whether a system handles millions or billions of events per day. Having architected core infrastructure across communication platforms, enterprise compliance pipelines, and high-throughput transaction systems, I have repeatedly seen how background instrumentation can silently become a bottleneck under heavy production load. Telemetry and observability come with their own challenges.