Why Logs, Metrics and Traces Still Don't Give You Real Observability
DevOps.com, Friday, May 29th, 2026
The three-pillar observability model has critical gaps that fail to catch modern distributed system failures.
While logs, metrics, and traces form the foundation of observability, this article argues they are insufficient for debugging production incidents in modern distributed systems.
The three-pillar model struggles with known unknowns (unanticipated failures), high-cardinality data blind spots, context collapse in asynchronous systems, and business logic correctness.
The article recommends moving beyond this model by adopting structured events, enabling high-cardinality querying, building continuous verification into pipelines, and instrumenting for failures you haven't yet encountered to achieve true observability.