How To Fix RSOS_SEARCH238 - 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: 238

• 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 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.
This forces the application to only store a small subset of the required
data in the shared memory of the application server. Also<(>,<)> every
time a search query is executed<(>,<)> the BW search on SAP HANA
framework must read all other required data from the database.

System Response

The performance of the search query might be slowed<(>,<)> because
reading the required data from database tables takes longer than
retrieving the data from the shared memory of the application server.

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_SEARCH238 - Search performance might be slowed due to small application buffer memory ?

  The SAP error message RSOS_SEARCH238 indicates that the search performance in the SAP system might be degraded due to insufficient application buffer memory. This typically occurs when the buffer memory 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 load, which can lead to performance issues.
  High Data Volume: A large volume of data being processed or searched can exceed the current buffer capacity.
  Configuration Issues: The system may not be optimally configured for the specific workload or data characteristics.
  
  Solution:
  
  
  Increase Buffer Size:
  
  You can increase the size of the application buffer memory. This can typically be done through the SAP system configuration settings.
  Navigate to the transaction code RZ10 to adjust the profile parameters related to buffer sizes. Look for parameters like rdisp/abap/buffersize and increase their values as needed.
  
  
  
  Monitor Buffer Usage:
  
  Use transaction ST02 (Tune Summary) to monitor the buffer usage and identify if the buffers are indeed full or if there are other performance bottlenecks.
  Analyze the buffer statistics to determine the optimal size for your specific workload.
  
  
  
  Adjust Application Settings:
  
  Review and adjust any application-specific settings that may impact buffer usage. This may include tuning the search algorithms or adjusting the way data is indexed.
  
  
  
  Regular Maintenance:
  
  Perform regular maintenance tasks such as database optimization, archiving old data, and ensuring that the system is not overloaded with unnecessary data.
  
  
  
  Consult SAP Documentation:
  
  Refer to SAP Notes and documentation for specific recommendations related to your version of SAP and the specific application you are using.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  RZ10: Profile parameter maintenance.
  ST02: Buffer management and tuning.
  ST04: Database performance analysis.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error message.
  
  
  Performance Monitoring: Regularly monitor system performance and buffer usage to proactively address potential issues before they impact users.
  
  
  By addressing the buffer size and ensuring that the system is properly configured, you can mitigate the performance issues associated with the RSOS_SEARCH238 error message.