How To Fix DMCLG466 - Access plan for &1 prelim. calc. &2 is calculated (ID &3, Blks &4)

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 466

• Message text: Access plan for &1 prelim. calc. &2 is calculated (ID &3, Blks &4)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG466 - Access plan for &1 prelim. calc. &2 is calculated (ID &3, Blks &4) ?

  The SAP error message DMCLG466 typically relates to issues with the access plan in the context of data management or database operations. This message indicates that the access plan for a preliminary calculation has been generated, but it may also imply that there are issues or inefficiencies in the way the data is being accessed or processed.
  Cause:
  
  Database Performance Issues: The access plan may be suboptimal due to database performance issues, such as missing indexes or inefficient query structures.
  Data Volume: Large volumes of data being processed can lead to longer calculation times and may trigger this message.
  Configuration Issues: Incorrect configuration settings in the SAP system or database can lead to inefficient access plans.
  Resource Limitations: Insufficient system resources (CPU, memory, etc.) can affect the ability to generate an efficient access plan.
  
  Solution:
  
  Analyze the Access Plan: Use tools like SQL trace or explain plan to analyze the access plan and identify bottlenecks or inefficiencies.
  Optimize Queries: Review and optimize the SQL queries involved in the calculation to ensure they are efficient.
  Create/Update Indexes: Ensure that appropriate indexes are created on the database tables to speed up data retrieval.
  Adjust Configuration: Review and adjust any relevant configuration settings in SAP or the database to improve performance.
  Monitor System Resources: Check system resources and ensure that the database server has adequate CPU, memory, and disk I/O capacity.
  Database Maintenance: Perform regular database maintenance tasks, such as updating statistics and reorganizing tables, to ensure optimal performance.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for specific error messages.
  Transaction Codes: Use transaction codes like ST22 (Dump Analysis) or SM21 (System Log) to check for any related dumps or logs that might provide more context on the error.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools (like ST03N) to analyze workload and performance metrics.
  Database Documentation: Refer to the documentation for your specific database (e.g., HANA, Oracle, SQL Server) for best practices on performance tuning and access plan optimization.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.