How To Fix DB02095 - Superfluous indexes

SAP Error Message - Details

• Message type: E = Error

• Message class: DB02 - For Oracle Component of the Database Monitor

• Message number: 095

• Message text: Superfluous indexes

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB02095 - Superfluous indexes ?

  The SAP error message DB02095, which indicates "Superfluous indexes," typically arises when there are indexes in the database that are not being used or are redundant. This can lead to unnecessary overhead in terms of storage and maintenance, and it can also impact performance negatively.
  Cause:
  
  Redundant Indexes: Multiple indexes may exist on the same table that serve the same purpose, making some of them unnecessary.
  Unused Indexes: Indexes that were created for specific queries that are no longer executed or have been modified.
  Changes in Application Logic: Changes in the application or database schema can render certain indexes obsolete.
  
  Solution:
  
  
  Identify Superfluous Indexes:
  
  Use database tools or SQL queries to analyze the usage of indexes. Most databases provide system views or tables that can help you identify which indexes are not being used.
  In SAP, you can use transaction codes like DB02 or DB01 to analyze database performance and index usage.
  
  
  
  Review Index Usage:
  
  Check the execution plans of your queries to see which indexes are being utilized.
  Look for indexes that have not been used for a significant period.
  
  
  
  Remove Unused or Redundant Indexes:
  
  Once you have identified the superfluous indexes, you can drop them using SQL commands or through the database management tools.
  Ensure that you have a backup and that you understand the implications of removing an index, as it may affect query performance.
  
  
  
  Regular Maintenance:
  
  Implement a regular review process for indexes to ensure that they remain relevant and necessary.
  Consider automating the monitoring of index usage to catch superfluous indexes early.
  
  
  
  Related Information:
  
  Performance Impact: Having too many indexes can slow down data modification operations (INSERT, UPDATE, DELETE) because the database has to maintain all the indexes.
  Database-Specific Tools: Different databases (e.g., Oracle, SQL Server, HANA) have their own tools and commands for analyzing and managing indexes.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to index management and performance tuning.
  Documentation: Refer to the official documentation for your specific database system for best practices on index management.
  
  By addressing the issue of superfluous indexes, you can improve the performance and efficiency of your SAP system and the underlying database.