How To Fix SHMM101 - Shared objects: Free memory

SAP Error Message - Details

• Message type: E = Error

• Message class: SHMM - Shared Objects Monitor

• Message number: 101

• Message text: Shared objects: Free memory

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 SHMM101 - Shared objects: Free memory ?

  The SAP error message SHMM101, which indicates "Shared objects: Free memory," typically relates to issues with the shared memory allocation in the SAP system. This error can occur when the shared memory segment is not properly configured or when the system runs out of available shared memory.
  Cause:
  
  Insufficient Shared Memory Configuration: The shared memory settings in the SAP system may not be configured to meet the demands of the applications running on it.
  Memory Leaks: Applications or processes may be consuming more memory than expected, leading to exhaustion of available shared memory.
  System Limits: The operating system may impose limits on the amount of shared memory that can be allocated, which can lead to this error if those limits are reached.
  Improper Kernel Parameters: The kernel parameters related to shared memory may not be set correctly, leading to insufficient memory allocation.
  
  Solution:
  
  
  Increase Shared Memory Size:
  
  Adjust the shared memory settings in the SAP profile parameters. You can increase the values for parameters like shmmax (maximum size of a single shared memory segment) and shmall (total amount of shared memory).
  Use transaction RZ10 to modify the instance profile and increase the abap/shm_size parameter.
  
  
  
  Check and Adjust Kernel Parameters:
  
  On Unix/Linux systems, you can check and modify kernel parameters using commands like sysctl or by editing /etc/sysctl.conf.
  Ensure that the parameters kernel.shmmax and kernel.shmall are set to appropriate values based on your system's memory capacity.
  
  
  
  Monitor Memory Usage:
  
  Use tools like top, htop, or vmstat to monitor memory usage and identify any processes that may be consuming excessive memory.
  Investigate and resolve any memory leaks in custom programs or third-party applications.
  
  
  
  Restart SAP System:
  
  In some cases, a restart of the SAP system may be necessary to clear up memory issues and reallocate shared memory.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may provide additional guidance or patches related to shared memory issues.
  
  
  
  Related Information:
  
  SAP Basis Administration: Understanding how to manage and configure SAP system parameters is crucial for maintaining system performance.
  Operating System Documentation: Familiarize yourself with the shared memory configuration specific to your operating system (Linux, AIX, Windows, etc.).
  SAP Community: Engage with the SAP Community forums for insights and shared experiences from other SAP professionals who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support for further assistance.