How To Fix RS_DB_DB2160 - &1 tables/partitions waited for concurrent load to accelerator &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_DB_DB2 - Messages for DB2-z/OS Implementation

• Message number: 160

• Message text: &1 tables/partitions waited for concurrent load to accelerator &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_DB_DB2160 - &1 tables/partitions waited for concurrent load to accelerator &2 ?

  The SAP error message RS_DB_DB2160 indicates that a data load operation is waiting for a concurrent load to finish on a specific table or partition in the SAP HANA database. This typically occurs in scenarios where multiple processes are trying to access or modify the same data simultaneously, leading to contention.
  Cause:
  
  Concurrent Load Operations: The error arises when one data load operation is trying to access a table or partition that is currently being loaded by another process. This can happen during data extraction, transformation, or loading (ETL) processes.
  Locking Mechanism: SAP HANA uses a locking mechanism to ensure data integrity. If one process has a lock on a table or partition, other processes must wait until the lock is released.
  Long-running Queries: If a query or load operation is taking longer than expected, it can lead to other operations being queued, resulting in this error.
  
  Solution:
  
  Monitor and Manage Load Processes: Use transaction codes like ST22 or SM37 to monitor background jobs and identify any long-running processes. If possible, terminate or optimize these jobs.
  Schedule Loads Appropriately: If you have multiple data loads scheduled, consider staggering them to avoid contention. This can help reduce the likelihood of concurrent loads on the same tables or partitions.
  Increase Resources: If the issue is frequent, consider increasing the resources allocated to your SAP HANA system, such as CPU and memory, to handle concurrent loads more efficiently.
  Optimize Queries: Review and optimize the queries or data load processes that are causing contention. This may involve indexing, partitioning, or rewriting queries for better performance.
  Check for Locks: Use the SAP HANA Studio or SQL commands to check for locks on the tables or partitions in question. You can use the SELECT * FROM M_LOCKS query to see current locks and their owners.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  SAP HANA Documentation: Review the official SAP HANA documentation for best practices on managing data loads and understanding locking mechanisms.
  Performance Monitoring Tools: Utilize SAP's performance monitoring tools to analyze system performance and identify bottlenecks.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the occurrence of the RS_DB_DB2160 error and improve the efficiency of your data load processes in SAP HANA.