How To Fix D3757 - Number of blocked pages paged in

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 757

• Message text: Number of blocked pages paged in

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message D3757 - Number of blocked pages paged in ?

  The SAP error message D3757, which states "Number of blocked pages paged in," typically relates to issues with memory management in the SAP system, particularly concerning the paging of memory pages. This error can occur when the system is trying to access memory pages that are blocked or not available, leading to performance issues or system instability.
  Cause:
  
  Memory Configuration: The SAP system may not be configured with sufficient memory resources, leading to excessive paging.
  High Workload: A sudden increase in workload or transactions can lead to memory saturation, causing pages to be blocked.
  Inefficient Queries: Poorly optimized queries or programs can consume excessive memory, leading to blocked pages.
  System Limits: The underlying operating system or database may have limits on memory usage that are being exceeded.
  Fragmentation: Memory fragmentation can lead to inefficient use of available memory, causing pages to be blocked.
  
  Solution:
  
  Increase Memory Allocation: Review and increase the memory allocation for the SAP instance. This can be done by adjusting the profile parameters (e.g., abap/heap_area_total, abap/heap_area_dia, etc.) in the instance profile.
  Optimize Queries: Analyze and optimize any long-running or resource-intensive queries that may be causing memory issues.
  Monitor Workload: Use transaction codes like ST03N or ST06 to monitor system performance and workload. Identify peak times and adjust resources accordingly.
  Check System Configuration: Ensure that the operating system and database are configured to support the required memory usage for the SAP system.
  Review Paging Settings: Check the operating system's paging settings and adjust them if necessary to allow for better memory management.
  Regular Maintenance: Perform regular system maintenance, including database optimization and cleanup, to ensure efficient memory usage.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to memory management and performance tuning for specific recommendations and patches.
  Transaction Codes: Use transaction codes like ST02 (Tune Summary), ST04 (Database Performance), and SM50 (Process Overview) to monitor and analyze memory usage.
  System Logs: Review system logs (SM21) for any additional error messages or warnings that may provide more context about the issue.
  Performance Tuning: Consider engaging with SAP Basis consultants for performance tuning and optimization if the issue persists.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the D3757 error and improve the overall performance of your SAP system.