How To Fix RSDD_ZA168 - Adjust shared memory of BW Accelerator

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 168

• Message text: Adjust shared memory of BW Accelerator

What causes this issue?

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

System Response

How to fix this error?

If the check of the shared memory in SAP NetWeaver BW Accelerator
identifies that a different amount of memory is allocated on each of the
blades, you are prompted to adjust the amount of memory allocated to the
shared memory on each blade so that there is an equal amount on each
blade.

Procedure for System Administrators

For more information, see SAP Notes 991567 and 997772.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA168 - Adjust shared memory of BW Accelerator ?

  The SAP error message RSDD_ZA168, which pertains to the BW Accelerator, typically indicates an issue with the shared memory allocation for the BW Accelerator. This error can occur when the BW Accelerator is unable to allocate the necessary shared memory for its operations, which can lead to performance issues or failures in executing queries.
  Cause:
  
  Insufficient Shared Memory: The most common cause of this error is that the shared memory allocated for the BW Accelerator is insufficient for the current workload or data volume.
  Configuration Issues: Incorrect configuration settings in the BW Accelerator or the underlying database can lead to this error.
  System Resource Limitations: The operating system or database may have limitations on the amount of shared memory that can be allocated.
  Concurrent Users: A high number of concurrent users or processes accessing the BW Accelerator can lead to increased memory demands.
  
  Solution:
  
  
  Adjust Shared Memory Settings:
  
  Increase the shared memory allocation for the BW Accelerator. This can typically be done in the configuration settings of the BW system or the database.
  Check the parameters related to shared memory in the SAP BW system and adjust them as necessary. This may involve modifying parameters in the instance profile or using transaction codes like RZ10.
  
  
  
  Monitor System Resources:
  
  Use monitoring tools to check the current memory usage and identify if there are any bottlenecks or resource constraints.
  Ensure that the server has enough physical memory available to accommodate the increased shared memory settings.
  
  
  
  Review Configuration:
  
  Review the configuration of the BW Accelerator and ensure that it is set up correctly according to SAP best practices.
  Check for any recent changes in the system that may have affected memory allocation.
  
  
  
  Restart Services:
  
  In some cases, restarting the BW Accelerator services or the entire BW system may help to clear any temporary issues related to memory allocation.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes or updates related to the BW Accelerator and shared memory issues. There may be specific patches or recommendations provided by SAP.
  
  
  
  Engage SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more detailed troubleshooting steps based on your specific system configuration.
  
  
  
  Related Information:
  
  SAP BW Accelerator Documentation: Review the official SAP documentation for BW Accelerator to understand its architecture and memory requirements.
  System Monitoring Tools: Utilize tools like SAP Solution Manager or other monitoring solutions to keep track of system performance and resource usage.
  Performance Tuning: Consider performance tuning strategies for your BW system to optimize memory usage and improve overall efficiency.
  
  By addressing the shared memory allocation and ensuring that the BW Accelerator is properly configured, you can resolve the RSDD_ZA168 error and improve the performance of your SAP BW system.