How To Fix DB11175 - Wait event 'log file switch (checkpoint incomplete)'

SAP Error Message - Details

• Message type: E = Error

• Message class: DB11 - Oracle Monitor: messages

• Message number: 175

• Message text: Wait event 'log file switch (checkpoint incomplete)'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DB11175 - Wait event 'log file switch (checkpoint incomplete)' ?

  The SAP error message DB11175, which indicates a wait event for "log file switch (checkpoint incomplete)," typically occurs in Oracle databases used with SAP systems. This error suggests that the database is unable to switch log files because a checkpoint is not yet complete. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Checkpoint Process: A checkpoint is a process that writes all modified data from memory to disk. If the checkpoint is incomplete, it means that the database is still in the process of writing data to the data files, and the log files cannot be switched until this process is finished.
  High Transaction Volume: A high volume of transactions can lead to a backlog in the checkpoint process, causing delays in log file switching.
  Insufficient I/O Performance: If the disk I/O performance is poor, it can slow down the checkpoint process, leading to this wait event.
  Configuration Issues: Incorrect database configuration settings, such as log file size or number of log files, can contribute to this issue.
  
  Solutions:
  
  Monitor Checkpoint Activity: Use Oracle's performance monitoring tools (like AWR reports) to check the status of checkpoints and identify any bottlenecks.
  Increase Log File Size: Consider increasing the size of the redo log files to reduce the frequency of log switches.
  Add More Redo Log Groups: Adding more redo log groups can help distribute the load and allow for more efficient log switching.
  Optimize I/O Performance: Ensure that the underlying storage system is optimized for performance. This may involve using faster disks, optimizing RAID configurations, or ensuring that there are no other processes competing for I/O resources.
  Adjust Checkpoint Settings: Review and adjust the database parameters related to checkpoints, such as LOG_CHECKPOINT_INTERVAL and LOG_CHECKPOINT_TIMEOUT, to better suit your workload.
  Database Maintenance: Regularly perform database maintenance tasks, such as archiving old logs and ensuring that there is enough space for new logs.
  
  Related Information:
  
  Oracle Documentation: Refer to Oracle's documentation for detailed explanations of checkpoints and log file management.
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error message.
  Performance Tuning: Consider engaging in performance tuning of the database to ensure that it can handle the workload efficiently.
  Monitoring Tools: Utilize monitoring tools like Oracle Enterprise Manager or third-party solutions to keep an eye on database performance and identify issues proactively.
  
  If the problem persists after trying these solutions, it may be beneficial to consult with a database administrator or SAP support for further assistance.