How To Fix RSDD_ZA235 - Complete CPU usage of all processes (%)

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 235

• Message text: Complete CPU usage of all processes (%)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA235 - Complete CPU usage of all processes (%) ?

  The SAP error message RSDD_ZA235, which indicates "Complete CPU usage of all processes (%)", typically arises in the context of SAP BW (Business Warehouse) or SAP HANA environments. This error suggests that the system is experiencing high CPU utilization, which can lead to performance issues and slow response times.
  Causes:
  
  High Workload: A sudden increase in data processing requests, such as heavy reporting or data loading activities, can lead to high CPU usage.
  Inefficient Queries: Poorly optimized queries or reports that require extensive calculations or data retrieval can consume excessive CPU resources.
  Background Jobs: Running multiple background jobs simultaneously can lead to resource contention and high CPU usage.
  System Configuration: Inadequate system resources (CPU, memory) or improper configuration settings can contribute to performance issues.
  Data Volume: Large volumes of data being processed or analyzed can lead to increased CPU load.
  Hardware Limitations: The underlying hardware may not be sufficient to handle the workload, especially if the system has not been scaled appropriately.
  
  Solutions:
  
  Monitor System Performance: Use transaction codes like ST03N (Workload Analysis) or ST06 (Operating System Monitor) to analyze CPU usage and identify the processes consuming the most resources.
  Optimize Queries: Review and optimize any long-running or resource-intensive queries. Consider using indexes, aggregations, or other optimization techniques.
  Schedule Jobs Wisely: Stagger background jobs to avoid running too many resource-intensive jobs at the same time.
  Increase System Resources: If the hardware is insufficient, consider upgrading the CPU or memory of the server.
  Adjust Configuration Settings: Review and adjust SAP parameters related to memory and CPU usage, such as rdisp/num_wp (number of work processes) and rdisp/wp_no_btc (number of background work processes).
  Analyze Data Volume: If applicable, consider archiving old data or implementing data reduction techniques to decrease the volume of data being processed.
  Check for Locks: Use transaction SM12 to check for any locks that might be causing delays in processing.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to performance issues and CPU utilization for specific recommendations and patches.
  SAP Community: Engage with the SAP Community forums for insights and shared experiences from other users facing similar issues.
  Performance Tuning Guides: Refer to SAP's official performance tuning guides for BW or HANA to implement best practices.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the high CPU usage and improve the overall performance of your SAP system.