How To Fix DB6PM278 - DB Partition &1: Size of BP &2 is AUTOMATIC, but STMM is turned OFF

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6PM - DB2 UDB for UNIX, Windows: Performance Monitoring

• Message number: 278

• Message text: DB Partition &1: Size of BP &2 is AUTOMATIC, but STMM is turned OFF

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB6PM278 - DB Partition &1: Size of BP &2 is AUTOMATIC, but STMM is turned OFF ?

  The SAP error message DB6PM278 indicates an issue related to database partitioning and the configuration of the Self-Tuning Memory Manager (STMM) in the context of SAP's database management. Here’s a breakdown of the cause, solution, and related information for this error:
  Cause:
  
  Database Partitioning: The error message refers to a database partition (BP) that is set to "AUTOMATIC" size. This means that the database is configured to automatically manage the size of this partition.
  STMM Disabled: The Self-Tuning Memory Manager (STMM) is a feature that allows the database to automatically adjust memory allocation for various components based on workload. If STMM is turned off, the database cannot automatically manage memory, which can lead to issues when partitions are set to automatic sizing.
  
  Solution:
  
  Enable STMM: The primary solution is to enable the Self-Tuning Memory Manager (STMM). This can typically be done through the database configuration settings. The exact steps may vary depending on the database system you are using (e.g., SAP HANA, DB2, etc.). 
  
  For example, in DB2, you can enable STMM by executing the following command:
  UPDATE DATABASE CONFIGURATION USING SELF_TUNING_MEM ON;
  
  
  
  Manual Configuration: If enabling STMM is not an option or if you prefer manual control, you can change the partition size from "AUTOMATIC" to a fixed size. This would involve setting a specific size for the partition based on your database requirements and workload.
  Review Database Documentation: Consult the documentation for your specific database system to understand the implications of enabling STMM and how to configure memory settings appropriately.
  
  Related Information:
  
  Database Management: Understanding how your specific database system manages memory and partitions is crucial. Each database system (e.g., SAP HANA, Oracle, DB2) has its own set of tools and commands for managing memory and partitions.
  Performance Monitoring: After making changes, monitor the performance of your database to ensure that the changes have the desired effect and that there are no new issues arising from the configuration changes.
  SAP Notes and Support: Check SAP Notes for any specific recommendations or patches related to this error message. SAP support can also provide guidance tailored to your specific environment.
  
  By addressing the STMM configuration and ensuring that your database partitions are set up correctly, you should be able to resolve the error message DB6PM278.