How To Fix MDC_PROCESS013 - Delta-merge failed for table &1 (and others), process remains unaffected

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_PROCESS - Messages In Context Of MDC Processing

• Message number: 013

• Message text: Delta-merge failed for table &1 (and others), process remains unaffected

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_PROCESS013 - Delta-merge failed for table &1 (and others), process remains unaffected ?

  The SAP error message MDC_PROCESS013 indicates that a delta merge operation has failed for a specific table in the SAP HANA database. This error typically occurs in the context of SAP HANA's multi-tenant database containers (MDC) and can affect the performance and data consistency of the database.
  Cause:
  The delta merge operation is responsible for merging the delta storage (where changes are temporarily stored) with the main storage of a table. The failure of this operation can be caused by several factors, including:
  
  Insufficient Resources: The database may not have enough memory or CPU resources to perform the delta merge.
  Locking Issues: There may be locks on the table that prevent the delta merge from completing.
  Corruption: There could be corruption in the data or metadata of the table.
  Configuration Issues: Incorrect configuration settings for the database or the specific table can lead to merge failures.
  High Load: A high load on the database can lead to timeouts or resource contention during the merge process.
  
  Solution:
  To resolve the MDC_PROCESS013 error, you can take the following steps:
  
  Check System Resources: Monitor the memory and CPU usage of the SAP HANA system. If resources are low, consider increasing them or optimizing the workload.
  Review Locks: Use the SAP HANA Studio or SQL commands to check for locks on the affected table. If locks are present, identify the sessions holding the locks and resolve them.
  Check Logs: Review the SAP HANA logs for any additional error messages or warnings that could provide more context about the failure.
  Manual Delta Merge: If the automatic delta merge fails, you can try to manually trigger a delta merge using SQL commands:
  ALTER TABLE <schema>.<table> MERGE;
  
  Database Health Check: Run a health check on the database to identify any potential issues with data or metadata.
  Configuration Review: Ensure that the configuration settings for the database and the specific table are correct and optimal for your workload.
  Restart Services: In some cases, restarting the SAP HANA services or the entire database may help resolve transient issues.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or patches related to this error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Refer to the official SAP HANA documentation for best practices on managing delta merges and performance tuning.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.