Open Observability Summit + OTel Community Day 2025

As Kubernetes and microservices architectures grow in importance and complexity, observability at scale remains a persistent challenge, particularly for cloud-native applications. This session focuses on how OpenTelemetry can help organizations bridge these gaps, offering comprehensive visibility across modern workloads - from mobile devices to mainframe systems.

We will showcase how OpenTelemetry integrates with complex infrastructures and unifies observability across both mainframe and distributed applications in a single pane of glass. We’ll explore techniques used to scale OpenTelemetry in high-cardinality environments, highlighting how we scaled the OpenTelemetry Collector to handle 3 million metric points per second, manage 250 million unique metrics per day and process 0.5 million spans per second.