How To Fix SDBALM068 - Last known log sequence number

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 068

• Message text: Last known log sequence number

Alerts
The highest assigned log sequence number is a number between 1 and 2^32
= 4,294,967,296. However, the counter displayed here, which shows this
number is only counted up from 1 to 2^31 - it then jumps to -2^31 and
counts up again to -1 (-1 is therefore the highest possible log sequence
number). The threshold values are therefore negative numbers.
<ZH>Green:</>
Number >= 0 , or
Number < -1,966,080 = 15 GB (in pages), or
Instance is not ONLINE
<ZH>Yellow:</>
-1,966,080 = -15 GB (in pages) < number< -1,310,720 = -10 GB (in pages
), or
Could not determine number
<ZH>Red:</>
-1,310,720 = -10 GB (in pages) < number < 0
Data Collector
<ZH>Collector A</>
(RZ20 -> SAP CCMS Technical Experts Monitors -> All Monitoring Contexts
,,-> <(><<)>Name of the database connection> -> Collectors and Internals
-> Collectors -> Collector A)

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Predefined runtime interval of Collector A: 5 Minutes

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM068 - Last known log sequence number ?

  The SAP error message SDBALM068, which refers to the "Last known log sequence number," typically occurs in the context of database log management, particularly when dealing with database backups and recovery processes. This error can indicate issues related to the database log files, such as inconsistencies or problems with the log sequence numbers.
  Cause:
  
  Log Sequence Number Mismatch: The error may arise when there is a mismatch between the expected log sequence number and the actual log sequence number in the database. This can happen if logs are missing or if there has been an incomplete backup or recovery process.
  Database Corruption: In some cases, the database may be corrupted, leading to inconsistencies in the log sequence numbers.
  Improper Configuration: Incorrect configuration settings for the database or the SAP system can also lead to this error.
  Incomplete Log Backups: If log backups are not completed successfully, it can lead to discrepancies in the log sequence numbers.
  
  Solution:
  
  Check Log Files: Verify the integrity of the log files. Ensure that all necessary log files are present and accessible.
  Database Consistency Check: Perform a consistency check on the database to identify any corruption or issues. This can often be done using database-specific tools or commands.
  Restore from Backup: If the log files are corrupted or missing, you may need to restore the database from the last known good backup. Ensure that you have a complete backup before proceeding.
  Reconfigure Database Settings: Review and correct any configuration settings that may be causing the issue. This may involve checking the database parameters related to log management.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and logs.
  
  Related Information:
  
  Database Management: Understanding how your specific database (e.g., HANA, Oracle, SQL Server) manages logs and backups is crucial. Each database has its own set of tools and commands for managing logs.
  SAP Basis Administration: Familiarity with SAP Basis administration tasks, including backup and recovery procedures, can help in troubleshooting this error.
  Monitoring Tools: Utilize monitoring tools to keep track of database performance and log management, which can help prevent such issues in the future.
  
  Always ensure that you have a reliable backup strategy in place to minimize data loss and facilitate recovery in case of such errors.