How To Fix SHMM051 - &1: Area &2, Instance &3.

SAP Error Message - Details

• Message type: E = Error

• Message class: SHMM - Shared Objects Monitor

• Message number: 051

• Message text: &1: Area &2, Instance &3.

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SHMM051 - &1: Area &2, Instance &3. ?

  The SAP error message SHMM051 typically relates to issues with the shared memory management in the SAP system. This error message indicates that there is a problem with the shared memory area, which can occur for various reasons, such as configuration issues, insufficient memory allocation, or problems with the instance.
  Cause:
  
  Insufficient Memory Allocation: The shared memory area may not have enough memory allocated to it for the operations being performed.
  Configuration Issues: The parameters related to shared memory in the SAP profile may not be set correctly.
  Instance Problems: The specific instance mentioned in the error may be facing issues, such as being down or misconfigured.
  Operating System Limits: The operating system may have limits on shared memory that are being exceeded.
  
  Solution:
  
  
  Check Memory Allocation:
  
  Review the memory settings in the SAP profile (e.g., instance profile or default profile) and ensure that the shared memory area is adequately sized.
  You can adjust the parameters like shmmax, shmall, and shmmni in the operating system if necessary.
  
  
  
  Review Configuration:
  
  Check the configuration settings for shared memory in the SAP system. Ensure that the parameters are set according to the recommendations for your system size and workload.
  Use transaction RZ10 to modify the instance profile and adjust the relevant parameters.
  
  
  
  Restart the Instance:
  
  Sometimes, simply restarting the affected instance can resolve temporary issues with shared memory.
  
  
  
  Check Operating System Settings:
  
  Ensure that the operating system's shared memory settings are configured correctly. This may involve checking /etc/sysctl.conf or using commands like ipcs to view current shared memory segments.
  
  
  
  Monitor System Resources:
  
  Use monitoring tools to check the overall memory usage of the system and ensure that there are no resource bottlenecks.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that may address this specific error message. SAP frequently updates its knowledge base with solutions for known issues.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like SM51 to check the status of instances and SM04 to monitor user sessions.
  SAP Documentation: Refer to the official SAP documentation for detailed guidelines on configuring shared memory and troubleshooting related issues.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.