How To Fix DB02072 - Oracle redo log buffer: Number of entries per redo log space request

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 072

• Message text: Oracle redo log buffer: Number of entries per redo log space request

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB02072 - Oracle redo log buffer: Number of entries per redo log space request ?

  The SAP error message DB02072 related to Oracle databases typically indicates an issue with the redo log buffer, specifically concerning the number of entries per redo log space request. This error can arise due to various reasons, including configuration issues, performance bottlenecks, or insufficient resources.
  Cause:
  
  High Transaction Volume: If your SAP system is processing a high volume of transactions, it may lead to an increased demand for redo log space.
  Insufficient Redo Log Buffer Size: The size of the redo log buffer may be too small to handle the volume of changes being made.
  Inefficient SQL Statements: Poorly optimized SQL queries can lead to excessive redo log generation.
  Database Configuration: Incorrect database parameters or settings can lead to inefficient handling of redo log entries.
  Disk I/O Bottlenecks: If the underlying storage system is slow, it can cause delays in writing redo logs, leading to this error.
  
  Solution:
  
  
  Increase Redo Log Buffer Size: You can increase the size of the redo log buffer by modifying the LOG_BUFFER parameter in the Oracle database. This can help accommodate more entries and reduce the frequency of the error.
  ALTER SYSTEM SET LOG_BUFFER = <new_size> SCOPE=BOTH;
  Replace <new_size> with an appropriate value (in bytes).
  
  
  Optimize SQL Statements: Review and optimize SQL queries to reduce the amount of redo generated. This can involve indexing, rewriting queries, or reducing the frequency of updates.
  
  
  Monitor and Tune Database Performance: Use Oracle's performance monitoring tools to identify bottlenecks and tune the database configuration accordingly. Look for high wait events related to redo log writes.
  
  
  Increase Number of Redo Log Groups: If you have a limited number of redo log groups, consider adding more groups to allow for better distribution of redo log writes.
  
  
  Check Disk I/O Performance: Ensure that the storage system where the redo logs are written is performing adequately. Consider upgrading hardware or optimizing storage configurations if necessary.
  
  
  Review Database Parameters: Check other related parameters such as LOG_CHECKPOINT_INTERVAL, LOG_CHECKPOINT_TIMEOUT, and LOG_FILE_SIZE to ensure they are set appropriately for your workload.
  
  
  Related Information:
  
  Oracle Documentation: Refer to Oracle's official documentation for detailed information on managing redo logs and performance tuning.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Monitoring Tools: Utilize tools like Oracle Enterprise Manager or SAP Solution Manager to monitor database performance and identify issues.
  
  Conclusion:
  Addressing the DB02072 error involves a combination of increasing buffer sizes, optimizing SQL performance, and ensuring that the database configuration is appropriate for the workload. Regular monitoring and tuning can help prevent this error from occurring in the future.