How To Fix QI165 - Shared memory error on subsystem

SAP Error Message - Details

• Message type: E = Error

• Message class: QI - Notifications for interface modules for connecting subsyst.

• Message number: 165

• Message text: Shared memory error on subsystem

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message QI165 - Shared memory error on subsystem ?

  The SAP error message QI165, which indicates a "Shared memory error on subsystem," typically arises in the context of SAP's Quality Management (QM) module or other related subsystems that utilize shared memory for processing. This error can occur due to various reasons, including configuration issues, memory allocation problems, or system resource limitations.
  Causes:
  
  Insufficient Memory Allocation: The shared memory segment may not have enough allocated memory for the processes that require it.
  Configuration Issues: Incorrect configuration settings in the SAP system or the operating system can lead to shared memory errors.
  Resource Limits: Operating system limits on shared memory segments may be reached, preventing the creation of new segments.
  Corrupted Memory Segments: If the shared memory segments are corrupted or not properly released, it can lead to errors.
  Concurrent Access Issues: Multiple processes trying to access the same shared memory segment simultaneously can cause conflicts.
  
  Solutions:
  
  
  Check Memory Allocation:
  
  Review the shared memory settings in the SAP system. You can check the parameters related to shared memory in the instance profile (e.g., shmmax, shmmin, shmni, etc.).
  Increase the shared memory allocation if necessary.
  
  
  
  Review Configuration:
  
  Ensure that the SAP kernel and the operating system are properly configured to handle shared memory.
  Check the SAP notes related to shared memory configuration for your specific version.
  
  
  
  Operating System Settings:
  
  On Unix/Linux systems, you can check and modify the shared memory settings using commands like ipcs and sysctl.
  For example, you may need to increase the values of kernel.shmmax and kernel.shmall.
  
  
  
  Clear Corrupted Segments:
  
  If you suspect that there are corrupted shared memory segments, you can clear them using the ipcrm command (on Unix/Linux) to remove the segments.
  Restart the SAP instance after clearing the segments.
  
  
  
  Monitor System Resources:
  
  Use monitoring tools to check the overall memory usage and ensure that the system has enough resources available.
  If the system is under heavy load, consider optimizing the workload or upgrading the hardware.
  
  
  
  SAP Support:
  
  If the issue persists, consider reaching out to SAP support for further assistance. They may provide specific notes or patches that address the issue.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to shared memory issues for your specific version of SAP. These notes often contain troubleshooting steps and configuration recommendations.
  System Logs: Review the system logs (e.g., dev_w0, dev_rfc) for additional error messages or warnings that may provide more context about the issue.
  Documentation: Refer to the SAP Help Portal for documentation on memory management and configuration best practices.
  
  By following these steps, you should be able to diagnose and resolve the shared memory error in your SAP system.