How To Fix ESH_RUBU_MSG027 - &1 bytes of free or displacable shared memory available

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_RUBU_MSG - ESH RuBu - Messages

• Message number: 027

• Message text: &1 bytes of free or displacable shared memory available

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 ESH_RUBU_MSG027 - &1 bytes of free or displacable shared memory available ?

  The SAP error message ESH_RUBU_MSG027 indicates that there is insufficient shared memory available for the operation you are trying to perform. This can occur in various scenarios, particularly when working with SAP's Enterprise Search or other components that require shared memory allocation.
  Cause:
  The error message typically arises due to one of the following reasons:
  
  
  Insufficient Shared Memory Configuration: The shared memory settings in the SAP system may not be configured to accommodate the needs of the application or process you are trying to execute.
  
  
  Memory Fragmentation: Even if there is a total amount of shared memory available, it may be fragmented, meaning that there are not enough contiguous blocks of memory to satisfy the request.
  
  
  High Load on the System: If the system is under heavy load, it may consume more shared memory than usual, leading to insufficient memory for new requests.
  
  
  Memory Leaks: There could be memory leaks in the application or other processes that are consuming shared memory without releasing it.
  
  
  Solution:
  To resolve the issue, you can take the following steps:
  
  
  Increase Shared Memory Allocation:
  
  You can increase the shared memory allocation in the SAP system profile parameters. Look for parameters like shmmax, shmmin, and shmall in the operating system settings and adjust them accordingly.
  In the SAP profile, you can also check and adjust parameters like rdisp/shm_max_size to increase the maximum size of shared memory.
  
  
  
  Check Memory Usage:
  
  Use transaction codes like SM04 or SM50 to monitor the memory usage of the system and identify any processes that are consuming excessive memory.
  You can also use tools like ST02 (Tune Summary) to analyze memory areas and check for any bottlenecks.
  
  
  
  Restart the System:
  
  If the issue is due to memory fragmentation or temporary high load, a restart of the SAP system may help to clear the memory and allow for a fresh allocation.
  
  
  
  Review and Optimize Code:
  
  If you suspect memory leaks, review the custom code or third-party applications that may be running in the system. Optimize them to ensure they are not consuming more memory than necessary.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional guidance.
  
  
  
  System Monitoring:
  
  Implement monitoring tools to keep track of memory usage and performance metrics to proactively manage memory allocation and avoid similar issues in the future.
  
  
  
  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 to see if other users have encountered similar issues and what solutions they have implemented.
  System Logs: Check system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the memory issue.
  
  By following these steps, you should be able to address the ESH_RUBU_MSG027 error and ensure that your SAP system has adequate shared memory for its operations.