How To Fix D4420 - Summary: SAP/OS400 roll management - active space

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 420

• Message text: Summary: SAP/OS400 roll management - active space

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message D4420 - Summary: SAP/OS400 roll management - active space ?

  The SAP error message D4420, which relates to SAP/OS400 roll management, indicates that the active space for roll areas is insufficient. This can occur in environments where SAP is running on IBM iSeries (formerly AS/400) systems. The roll area is a part of memory used to store data that cannot fit into the main memory, and when it runs out of space, it can lead to performance issues or system errors.
  Cause:
  
  Insufficient Roll Area Size: The roll area may not be configured with enough memory to handle the current workload.
  High User Load: An increase in the number of users or transactions can lead to higher memory consumption.
  Long-Running Transactions: Transactions that take a long time to complete can consume roll area space.
  Memory Leaks: Inefficient coding or poorly designed programs can lead to memory not being released properly.
  
  Solution:
  
  
  Increase Roll Area Size:
  
  You can increase the size of the roll area by adjusting the parameters in the SAP profile. Look for parameters like rdisp/roll_area and rdisp/roll_max and increase their values.
  Use transaction RZ10 to modify the instance profile and then restart the SAP instance for the changes to take effect.
  
  
  
  Monitor and Optimize Workload:
  
  Analyze the workload on the system to identify any long-running transactions or processes that may be consuming excessive resources.
  Optimize the code of any custom programs that may be causing memory issues.
  
  
  
  Review User Sessions:
  
  Check the number of active user sessions and consider limiting the number of concurrent users if necessary.
  
  
  
  System Resources:
  
  Ensure that the underlying hardware has sufficient resources (CPU, RAM) to support the SAP workload.
  
  
  
  Regular Maintenance:
  
  Perform regular system maintenance and monitoring to identify potential issues before they lead to errors.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to D4420 for any specific recommendations or patches that may address the issue.
  SAP Documentation: Review the SAP Basis documentation for guidelines on memory management and roll area configuration.
  Performance Monitoring Tools: Utilize SAP performance monitoring tools to keep track of memory usage and identify bottlenecks.
  
  If the problem persists after implementing these solutions, it may be beneficial to consult with SAP support or a professional with experience in SAP on IBM iSeries systems.