This SAP Expert Lecture helps you manage SQL performance fluctuations in SAP HANA. You start by defining fluctuation issues and outlining a structured approach to diagnosis. Next, you learn to trace query performance over time using HANA traces and monitoring views, and rule out application-level factors. Then, you explore HANA's inner workings by analyzing how input parameters, data distribution, statistics, and query plan changes, including HEX engine fallbacks and auto-recompilation, impact runtime. Finally, you learn HANA’s SQL Plan Management features. These features include capturing stable plans with SQL Plan Stability, tailoring plan variants for parameter-driven skews, and using the SAP SQL Plan Advisor’s automated A/B testing.
