Using GBase 8s onstat Diagnostics to Guide Evidence-Based Performance Tuning

A DEV Community article argues that database performance tuning should start from measurable evidence rather than observed symptoms. For GBase 8s environments, it describes using onstat commands such as onstat -g ses, onstat -g sql, and onstat -g act to inspect sessions, SQL activity, and workload behavior, with command availability to be confirmed per release. The piece recommends capturing baselines during normal and degraded periods, mapping symptoms like slow queries, blocking, or timeouts to relevant evidence, and avoiding high CPU or session counts as root causes on their own. It also suggests recording metrics such as response time, throughput, and storage latency, and following a cycle of hypothesis, single-factor change, and measurement, ideally in a representative test environment.