How To Fix SDX311 - No free processes - loading from file &1 is started synchronously

SAP Error Message - Details

• Message type: E = Error

• Message class: SDX - Mass Data Transfer Workbench Using BAPIs

• Message number: 311

• Message text: No free processes - loading from file &1 is started synchronously

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDX311 - No free processes - loading from file &1 is started synchronously ?

  The SAP error message SDX311 indicates that there are no free processes available to handle the request for loading data from a specified file. This situation typically arises in the context of data loading operations, such as those performed in SAP Data Services or during batch processing.
  Cause:
  
  Insufficient Background Processes: The SAP system may not have enough background processes configured to handle the load requests. This can happen if the system is under heavy load or if the number of background work processes is set too low.
  Long-Running Jobs: If there are long-running jobs or processes occupying the available background processes, new requests may be queued until a process becomes available.
  Configuration Issues: The configuration settings for the number of background processes in the SAP instance may not be optimized for the workload.
  System Resource Limitations: The server may be experiencing resource constraints (CPU, memory, etc.) that prevent it from allocating processes effectively.
  
  Solution:
  
  
  Increase Background Processes:
  
  Go to transaction RZ10 to adjust the instance profile settings.
  Look for the parameter rdisp/wp_no_btc and increase its value to allow more background work processes.
  After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Monitor and Optimize Jobs:
  
  Use transaction SM37 to monitor background jobs and identify any long-running or stuck jobs.
  If necessary, terminate or optimize these jobs to free up background processes.
  
  
  
  Check System Resources:
  
  Use transaction ST02 (buffer management) and ST04 (database performance) to monitor system performance and identify any bottlenecks.
  Ensure that the server has adequate resources (CPU, memory, disk I/O) to handle the workload.
  
  
  
  Review Load Balancing:
  
  If you are running a distributed system, ensure that the load is balanced across multiple application servers.
  Check the configuration of the load balancer to ensure it is distributing requests effectively.
  
  
  
  Schedule Jobs During Off-Peak Hours:
  
  If possible, schedule heavy data loading jobs during off-peak hours to reduce contention for background processes.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  RZ10: Profile parameter maintenance.
  SM37: Job monitoring.
  ST02: Buffer management.
  ST04: Database performance analysis.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to background processing or performance tuning.
  
  
  Documentation: Review SAP documentation on performance tuning and background processing for best practices.
  
  
  By following these steps, you should be able to resolve the SDX311 error and improve the performance of your SAP system regarding data loading operations.