How To Fix /SAPAPO/CTM1777 - Available memory on optimization server is low (available: &1%)

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 777

• Message text: Available memory on optimization server is low (available: &1%)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1777 - Available memory on optimization server is low (available: &1%) ?

  The SAP error message /SAPAPO/CTM1777 Available memory on optimization server is low (available: &1%) indicates that the optimization server in SAP Advanced Planning and Optimization (APO) is running low on available memory. This can lead to performance issues or even failures in executing optimization tasks.
  Causes:
  
  High Load: The optimization server may be handling a large number of requests or complex optimization problems that require more memory than is currently available.
  Insufficient Memory Allocation: The server may not have been allocated enough memory to handle the expected workload.
  Memory Leaks: There could be issues in the code or configuration that are causing memory to not be released properly after use.
  Configuration Issues: Incorrect settings in the APO or the underlying database can lead to inefficient memory usage.
  Concurrent Processes: Multiple optimization processes running simultaneously can consume available memory quickly.
  
  Solutions:
  
  
  Increase Memory Allocation:
  
  Review and increase the memory settings for the optimization server. This can typically be done in the SAP system configuration settings.
  Check the instance profile parameters (e.g., abap/heap_area_total, abap/heap_area_dia, etc.) and adjust them as necessary.
  
  
  
  Optimize the Optimization Job:
  
  Review the optimization job settings to ensure they are not overly complex or resource-intensive.
  Consider breaking down large optimization tasks into smaller, more manageable ones.
  
  
  
  Monitor and Manage Load:
  
  Use transaction codes like ST02 (Tune Summary) and SM50 (Process Overview) to monitor memory usage and identify any processes that are consuming excessive resources.
  Schedule optimization jobs during off-peak hours to reduce load on the server.
  
  
  
  Check for Memory Leaks:
  
  Investigate if there are any known issues or patches related to memory leaks in the version of SAP APO you are using.
  Apply any relevant SAP Notes or updates that address memory management.
  
  
  
  Review Configuration:
  
  Ensure that the configuration settings for the optimization server are appropriate for your environment and workload.
  Consult with your SAP Basis team to review system performance and configuration.
  
  
  
  Restart the Optimization Server:
  
  If the issue persists, consider restarting the optimization server to clear any temporary memory issues.
  
  
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on memory management in APO.
  Documentation: Review the official SAP documentation for APO and optimization server configuration for best practices.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools to gain insights into memory usage and identify potential bottlenecks.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the memory-related error and improve the performance of your optimization server in SAP APO.