Subject: SAP-HANA-Live
In today’s fast-paced business environment, real-time insights are crucial for effective decision-making. SAP HANA Live leverages the power of SAP HANA’s in-memory computing to deliver real-time operational reporting through Core Data Services (CDS) views. However, as data volumes grow and business logic becomes more complex, optimizing the performance of CDS views is essential to ensure quick response times and efficient resource utilization.
This article explores practical strategies and best practices to optimize the performance of CDS views, specifically in the context of SAP-HANA-Live implementations.
CDS views are semantic data models defined directly on the SAP HANA database layer. They enable complex data modeling, including joins, aggregations, and calculations. The performance of these views depends on several factors:
Optimizing CDS views ensures that analytical queries execute efficiently, delivering timely results for operational reporting and analytics.
@ObjectModel.association.cardinality to help SAP HANA plan efficient join strategies.Apply filters as close to the data source as possible to reduce the volume of data processed in later steps. Use the annotation:
@ObjectModel.reductionBehavior: #FILTER
to ensure that predicates are pushed down to the database layer.
Use appropriate data types and minimize the length of string fields to reduce memory footprint and speed up processing.
@Analytics.dataCategory: #CUBE for analytical views helps optimize aggregation.@ObjectModel.buffering: #ENABLED can improve performance by caching frequently used data.Deeply nested CDS views can increase the complexity of the SQL generated and degrade performance. Flatten views when possible or optimize nested views individually.
Parameters allow CDS views to accept input dynamically, reducing data processed and improving performance for specific queries.
Use LIMIT or top N queries during development and testing to reduce data volume.
Use the SAP HANA Studio or SAP HANA Cockpit to analyze execution plans and identify expensive operations such as full table scans or large join operations.
Trace SQL execution to analyze runtime behavior and bottlenecks.
Use tools like ST05 (SQL Trace) and ST12 (Performance Trace) in the SAP backend to monitor CDS view executions.
SAP-HANA-Live provides standard CDS views designed for operational reporting. When extending or customizing these views:
Performance optimization of CDS views is a critical success factor in SAP-HANA-Live projects. By carefully designing CDS views, applying best practices, and continuously monitoring system behavior, organizations can deliver fast, reliable, and scalable real-time analytics.
A well-optimized CDS view not only improves user experience but also maximizes the return on investment in SAP HANA’s in-memory technology, supporting agile and informed business decisions.