How To Fix RT774 - Share of kernel memory used by all kernel components

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 774

• Message text: Share of kernel memory used by all kernel components

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT774 - Share of kernel memory used by all kernel components ?

  The SAP error message RT774 indicates that the share of kernel memory used by all kernel components has reached a critical level. This can lead to performance issues or even system instability if not addressed. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  
  High Memory Usage: The kernel components of the SAP system are consuming a significant amount of memory, which can be due to various factors such as:
  
  High workload or traffic on the SAP system.
  Inefficient coding or poorly optimized ABAP programs.
  Memory leaks in custom programs or third-party add-ons.
  Configuration settings that are not optimized for the current workload.
  
  
  
  Kernel Configuration: The configuration of the SAP kernel may not be optimal for the current usage patterns, leading to excessive memory consumption.
  
  
  System Resources: Insufficient physical memory on the server can exacerbate the issue, especially if the system is under heavy load.
  
  
  Solutions:
  
  
  Monitor Memory Usage: Use transaction codes like ST02 (Tune Summary) and ST03 (Workload Analysis) to monitor memory usage and identify which components are consuming the most memory.
  
  
  Optimize ABAP Programs: Review and optimize any custom ABAP programs that may be consuming excessive memory. Look for inefficient loops, large internal tables, or unnecessary data retrieval.
  
  
  Adjust Kernel Parameters: Review and adjust the kernel parameters related to memory allocation. This can include parameters like abap/heap_area_dia, abap/heap_area_nondia, and others that control memory allocation for dialog and non-dialog processes.
  
  
  Increase Physical Memory: If the server is consistently running low on memory, consider upgrading the physical memory of the server to accommodate the workload.
  
  
  Kernel Upgrade: Ensure that you are using the latest version of the SAP kernel, as newer versions may include performance improvements and bug fixes that can help reduce memory usage.
  
  
  Restart the System: In some cases, a system restart may temporarily alleviate the issue by clearing memory, but this is not a long-term solution.
  
  
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to memory usage in your version of SAP. SAP frequently releases notes that provide fixes or recommendations for known issues.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on memory management and kernel parameters.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  Performance Tuning: Consider conducting a performance tuning exercise to identify bottlenecks and optimize the overall system performance.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the RT774 error and improve the stability and performance of your SAP system.