How To Fix RSOS_SEARCH265 - Buffering of generated SQL statements not recommended

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOS_SEARCH -

• Message number: 265

• Message text: Buffering of generated SQL statements not recommended

What causes this issue?

You have enabled buffering of required generated SQL statements.

System Response

Buffering of generated SQL statements causes high consumption of the
application server's shared buffer infrastructure when BW Search
framework is accessed frequently. This can occur if the BW Search
infrastructure is used within other tools like the BW Modelings Tools in
Eclipse.
The generated SQL statements are typically generated for a specific
user, meaning that the information stored in the shared buffer needs to
be updated every time a single search query is run. In combination with
very frequent access as mentioned above<(>,<)> this leads to huge
performance losses when updating the shared buffer.

How to fix this error?

Disable buffering of generated SQL statements in order to avoid
performance problems.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSOS_SEARCH265 - Buffering of generated SQL statements not recommended ?

  The SAP error message RSOS_SEARCH265 indicates that the system has detected a situation where the buffering of generated SQL statements is not recommended. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA environments where SQL statements are dynamically generated for data retrieval.
  Cause:
  The error can arise due to several reasons, including:
  
  
  Dynamic SQL Generation: The system is generating SQL statements dynamically based on user queries or data requests. This can lead to performance issues if the SQL statements are not optimized for buffering.
  
  
  Complex Queries: If the SQL statements are complex or involve multiple joins, aggregations, or subqueries, the system may determine that buffering is not effective.
  
  
  Data Volume: Large volumes of data being processed can also lead to inefficiencies in buffering, as the overhead of managing the buffer may outweigh the benefits.
  
  
  Database Configuration: Certain database configurations or settings may not support efficient buffering for the types of queries being executed.
  
  
  Solution:
  To address the RSOS_SEARCH265 error, consider the following solutions:
  
  
  Optimize Queries: Review and optimize the SQL queries being generated. Simplifying complex queries or breaking them into smaller, more manageable parts can help.
  
  
  Adjust Buffering Settings: Check the buffering settings in your SAP BW or HANA system. You may need to adjust these settings based on the specific use case and data model.
  
  
  Database Tuning: Work with your database administrator to tune the database for better performance. This may include indexing, partitioning, or adjusting memory settings.
  
  
  Use Aggregates: If applicable, consider using aggregates in your BW queries to reduce the amount of data being processed and improve performance.
  
  
  Monitor Performance: Use performance monitoring tools to analyze the execution of SQL statements and identify bottlenecks. This can help in making informed decisions about query optimization and buffering.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or specific recommendations for your version of SAP.
  
  
  Related Information:
  
  SAP BW Documentation: Review the official SAP BW documentation for best practices on query performance and buffering.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  Performance Analysis Tools: Utilize tools like SAP BW Query Monitor or transaction ST05 (SQL Trace) to analyze the performance of your queries and identify areas for improvement.
  
  By following these steps, you should be able to mitigate the RSOS_SEARCH265 error and improve the performance of your SAP system.