How To Fix 00423 - Shared memory error

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 423

• Message text: Shared memory error

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00423 - Shared memory error ?

  The SAP error message "00423 Shared memory error" typically indicates an issue with the shared memory allocation in the SAP system. This can occur due to various reasons, such as insufficient memory allocation, configuration issues, or problems with the operating system.
  Causes:
  
  Insufficient Shared Memory Allocation: The SAP instance may not have enough shared memory allocated to it, which can lead to this error.
  Kernel Parameters: The operating system kernel parameters related to shared memory may not be configured correctly.
  Resource Limits: The system may have reached its limits for shared memory segments.
  Configuration Issues: Incorrect configuration in the SAP profile or parameters can lead to shared memory errors.
  Operating System Issues: Problems with the operating system or its configuration can also cause this error.
  
  Solutions:
  
  
  Check and Increase Shared Memory Allocation:
  
  Review the SAP instance profile (usually found in the instance directory) and check the parameters related to shared memory, such as abap/shared_memory and abap/heap_area_total.
  Increase the values if they are set too low.
  
  
  
  Adjust Kernel Parameters:
  
  On Unix/Linux systems, check the kernel parameters for shared memory (e.g., shmmax, shmall, shmmni, etc.) using commands like ipcs -lm.
  You may need to modify /etc/sysctl.conf or use sysctl commands to adjust these parameters. For example:
  sysctl -w kernel.shmmax=2147483648
  sysctl -w kernel.shmall=2097152
  
  After making changes, apply them using sysctl -p.
  
  
  
  Check Resource Limits:
  
  Ensure that the user running the SAP instance has sufficient resource limits. You can check this using the ulimit command.
  Increase limits for shm, mem, and other relevant resources if necessary.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that resolve known issues.
  
  
  
  Restart the SAP Instance:
  
  After making changes to the configuration or kernel parameters, restart the SAP instance to apply the changes.
  
  
  
  Consult System Logs:
  
  Review the system logs (e.g., dev_w0, dev_disp) for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on memory management and configuration.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Operating System Documentation: Consult the documentation for your specific operating system for guidance on configuring shared memory settings.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your system administrator or SAP support for further investigation.