How To Fix D3751 - CPU utilization (OS/390)

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 751

• Message text: CPU utilization (OS/390)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message D3751 - CPU utilization (OS/390) ?

  The SAP error message D3751 indicates that the CPU utilization on an OS/390 (IBM's mainframe operating system) is exceeding acceptable limits. This can lead to performance issues and may affect the overall functioning of the SAP system.
  Cause:
  
  High Workload: A sudden increase in workload or batch jobs can lead to high CPU utilization.
  Inefficient Programs: Poorly optimized ABAP programs or reports that consume excessive CPU resources.
  Database Performance: Inefficient database queries or locks can lead to increased CPU usage.
  System Configuration: Incorrect system parameters or configurations that do not align with the workload requirements.
  Resource Contention: Other applications or processes running on the same mainframe may be consuming CPU resources.
  
  Solution:
  
  Monitor CPU Usage: Use monitoring tools to analyze CPU usage patterns and identify the processes consuming the most resources.
  Optimize ABAP Programs: Review and optimize any ABAP programs or reports that are running during peak times. Use transaction codes like ST05 (SQL Trace) and ST12 (Performance Analysis) to identify bottlenecks.
  Database Tuning: Analyze and optimize database queries. Ensure that indexes are used effectively and that there are no long-running transactions.
  Adjust System Parameters: Review and adjust system parameters related to CPU allocation and workload management.
  Load Balancing: If possible, distribute the workload more evenly across available resources or schedule batch jobs during off-peak hours.
  Upgrade Hardware: If the workload consistently exceeds the CPU capacity, consider upgrading the hardware or increasing the number of CPU cores available to the SAP system.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide specific guidance or patches related to CPU utilization issues.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like SAP Solution Manager) to get insights into system performance.
  Documentation: Refer to SAP documentation for best practices on performance tuning and system configuration for OS/390 environments.
  Consult with Basis Team: Work closely with your SAP Basis team to analyze system logs and performance metrics to identify root causes.
  
  By addressing the underlying causes of high CPU utilization, you can improve the performance of your SAP system running on OS/390.