How To Fix SHMM037 - Could not set shared lock for memory snapshot

SAP Error Message - Details

• Message type: E = Error

• Message class: SHMM - Shared Objects Monitor

• Message number: 037

• Message text: Could not set shared lock for memory snapshot

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 SHMM037 - Could not set shared lock for memory snapshot ?

  The SAP error message SHMM037, which states "Could not set shared lock for memory snapshot," typically occurs in the context of SAP's memory management, particularly when dealing with shared memory segments. This error can arise due to various reasons, including issues with memory allocation, permissions, or system resource limits.
  Causes:
  
  Insufficient Permissions: The user or process may not have the necessary permissions to access or modify the shared memory segments.
  Memory Limits: The system may have reached its limit for shared memory segments, which can prevent new locks from being set.
  Configuration Issues: Incorrect configuration settings in the SAP system or the operating system can lead to this error.
  Concurrent Access: Multiple processes trying to access the same memory segment simultaneously can lead to locking issues.
  Kernel Bugs: In some cases, bugs in the SAP kernel or the underlying operating system can cause this error.
  
  Solutions:
  
  Check Permissions: Ensure that the user or process has the necessary permissions to access shared memory. This may involve checking user groups and roles in the operating system.
  Increase Memory Limits: If the system has reached its shared memory limits, consider increasing the limits. This can be done by adjusting kernel parameters (e.g., shmmax, shmall, shmmni) in the operating system.
  Review Configuration: Check the SAP configuration settings related to memory management. Ensure that they are set correctly according to the system requirements.
  Restart SAP Services: Sometimes, simply restarting the SAP services or the entire system can resolve temporary locking issues.
  Check for Concurrent Processes: Investigate if multiple processes are trying to access the same memory segment. If so, consider serializing access or adjusting the application logic.
  Update SAP Kernel: If the issue persists, check for updates or patches for the SAP kernel that may address known bugs related to memory management.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to the SHMM037 error. SAP frequently updates its knowledge base with solutions for known issues.
  Operating System Logs: Review the operating system logs for any related errors or warnings that could provide additional context for the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found effective.
  
  If the problem continues after trying the above solutions, it may be necessary to contact SAP support for further assistance.