Statement Digest Limit Reached
infoPerformance Schema statement digest table full, losing query performance data. When performance_schema_digests_size limit reached, new unique query patterns cannot be instrumented, causing blind spots in performance monitoring.
mysql.performance.performance_schema_digest_lost > 0 and increasing, with events_statements count approaching performance_schema_digests_size limit
Increase performance_schema_digests_size in configuration (requires restart). Default is often insufficient for applications with many unique query patterns. Review performance_schema.events_statements_summary_by_digest table size: SELECT COUNT(*) to see utilization. If digest loss occurs, consider: 1) Increase digests_size to accommodate workload, 2) Investigate why so many unique queries - may indicate lack of prepared statements or dynamic query generation. Balance memory usage: each digest entry consumes ~1KB. Monitor performance_schema.memory_summary_global_by_event_name for PS memory usage.