How To Fix /SAPAPO/OM_PERF_MSG309 - Normal objects: Dereference (using mass-op) against OMS cache

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_PERF_MSG -

• Message number: 309

• Message text: Normal objects: Dereference (using mass-op) against OMS cache

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_PERF_MSG309 - Normal objects: Dereference (using mass-op) against OMS cache ?

  The SAP error message /SAPAPO/OM_PERF_MSG309 typically indicates a performance issue related to the Online Monitoring System (OMS) cache in SAP Advanced Planning and Optimization (APO). This error occurs when there is a problem with dereferencing normal objects during a mass operation against the OMS cache.
  Cause:
  
  Cache Issues: The OMS cache may be overloaded or not properly configured, leading to performance degradation when accessing normal objects.
  Data Volume: A large volume of data being processed in a mass operation can strain the system, causing delays or failures in dereferencing objects.
  System Configuration: Incorrect settings in the APO system or the underlying database can lead to inefficiencies in how data is accessed and processed.
  Locks and Contention: If multiple processes are trying to access the same data simultaneously, it can lead to contention and performance issues.
  
  Solution:
  
  Check Cache Configuration: Review the configuration of the OMS cache. Ensure that it is set up correctly and that the cache size is appropriate for the volume of data being processed.
  Monitor System Performance: Use transaction codes like /SAPAPO/OM_MONITOR to monitor the performance of the OMS and identify any bottlenecks or issues.
  Optimize Data Volume: If possible, reduce the volume of data being processed in a single mass operation. Break down large operations into smaller batches to improve performance.
  Database Optimization: Ensure that the underlying database is optimized. This may include indexing, updating statistics, or other database maintenance tasks.
  Check for Locks: Use transaction codes like SM12 to check for locks that may be causing contention. Resolve any unnecessary locks that could be impacting performance.
  System Updates: Ensure that your SAP system is up to date with the latest patches and updates, as performance improvements and bug fixes are often included in these updates.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to this error message for specific guidance or patches that may address the issue.
  Performance Tuning: Consider engaging in performance tuning activities for your APO system, which may include analyzing and optimizing planning runs, background jobs, and other processes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found effective.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support for further assistance.