How To Fix RSOS_SEARCH240 - Search performance might be slowed due to small application buffer memory

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOS_SEARCH -

• Message number: 240

• Message text: Search performance might be slowed due to small application buffer memory

What causes this issue?

Usually all the data, which is required to run a search query and which
is generated when a search query is run<(>,<)> is stored uncompressed in
the shared memory of the application server. This improves the
performance of the BW search in the SAP HANA application when the search
is called multiple times.
Currently the BW search on the SAP HANA application cannot store all the
generated data required in the shared memory of the application server
in uncompressed format. This forces the application to compress the data
before writing to the shared memory of the application server.

System Response

The performance of the search query might be slowed, because reading
compressed data from the shared memory of the application server takes
longer than reading uncompressed data.

How to fix this error?

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

Procedure for System Administrators

The application buffer can be filled to an internal maximum limit, which
can be adjusted using the profile parameter rsdb/obj/buffersize (SHARED
BUFFER).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSOS_SEARCH240 - Search performance might be slowed due to small application buffer memory ?

  The SAP error message RSOS_SEARCH240 indicates that the search performance in the SAP system might be degraded due to insufficient application buffer memory. This typically occurs when the buffer size allocated for the application is too small to handle the volume of data being processed, leading to slower search operations.
  Cause:
  
  Insufficient Buffer Size: The application buffer memory is not adequately sized to handle the data being processed, which can lead to performance issues.
  High Data Volume: A large volume of data being searched can overwhelm the existing buffer size.
  Configuration Issues: The system may not be optimally configured for the specific workload or data access patterns.
  
  Solution:
  
  
  Increase Buffer Size:
  
  You can increase the size of the application buffer memory. This is typically done in the SAP system configuration settings.
  Navigate to the transaction code RZ10 (Profile Parameter Maintenance) and look for parameters related to buffer sizes, such as abap/buffersize or rsdb/ntab_size.
  Adjust the parameters to increase the buffer size as needed. Make sure to follow your organization's change management procedures.
  
  
  
  Monitor Performance:
  
  Use transaction codes like ST02 (Tune Summary) to monitor buffer performance and identify if the changes have improved the situation.
  Analyze the workload and data access patterns to ensure that the buffer size is appropriate for the current usage.
  
  
  
  Database Optimization:
  
  Consider optimizing database queries and indexes to improve search performance.
  Regularly perform database maintenance tasks, such as updating statistics and reorganizing tables, to ensure optimal performance.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or patches related to this error message.
  
  
  
  Testing:
  
  After making changes, conduct performance testing to ensure that the adjustments have resolved the issue without introducing new problems.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on buffer management and performance tuning.
  SAP Community: Engage with the SAP Community forums for insights and experiences shared by other users who may have encountered similar issues.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools to gain insights into system performance and identify bottlenecks.
  
  By addressing the buffer size and monitoring the system's performance, you can mitigate the impact of the RSOS_SEARCH240 error and improve search performance in your SAP environment.