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Goal Establish alerting that surfaces genuine performance issues while suppressing false positives caused by sampling granularity. Constraints MariaDB’s Performance Schema samples at a default 10 s interval, potentially missing brief spikes. The Prometheus exporter translates these tables into metrics, but the exporter itself does not alter the sampling rate
Goal Determine a reliable way to capture actual query execution cost in MySQL 8.0+ without jeopardizing live traffic. Constraints EXPLAIN returns optimizer estimates only and adds negligible overhead. EXPLAIN ANALYZE executes the statement, revealing real timing and row counts, but can increase latency and modify data for DML. Performance Schema digests aggr
Goal: Configure MySQL Performance Schema to provide aggregated statement and error metrics for alerting that signal real problems without generating excessive notifications. Challenge: Enabling the right combination of setup_consumers and setup_instruments balances alert coverage against runtime overhead and data volume, but the optimal set varies with MySQL
prometheus
mariadb