How To Fix RT639 - Cross-system number of background work processes for high priority jobs

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 639

• Message text: Cross-system number of background work processes for high priority jobs

What causes this issue?

The number of background work processes that is reserved for background
jobs of high priority (class A) system-wide is displayed here. With
this reservation, you can ensure that especially important jobs always
have enough resources, even when there is high usage of the background
system.

System Response

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

How to fix this error?

To find out how to reserve background work processes for high priority
jobs, choose <LS>SAP Library -> SAP Web Application Server ->
Computing Center Management System (BC-CCM) -> Background Processing ->
Job Scheduling Explained -> Scheduling Background Jobs -> Prioritizing
Class A Jobs </> or click
<DS:KENO.5CC5A5F0C8C05541958CB43DF11F6306>here</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT639 - Cross-system number of background work processes for high priority jobs ?

  The SAP error message RT639 indicates that there is a configuration issue related to the number of background work processes available for high-priority jobs across different systems in a distributed environment. This error typically arises when the system is unable to allocate sufficient background work processes to handle high-priority jobs, which can lead to delays or failures in job execution.
  Cause:
  
  Insufficient Background Work Processes: The number of background work processes configured in the system may be too low to handle the volume of high-priority jobs.
  Cross-System Configuration: In a landscape with multiple SAP systems (e.g., Development, Quality Assurance, Production), the configuration for background processing may not be consistent or optimal across these systems.
  Job Priority Settings: High-priority jobs may be competing for limited resources, leading to contention and the inability to execute jobs in a timely manner.
  System Load: The overall load on the system may be high, causing delays in job processing.
  
  Solution:
  
  
  Increase Background Work Processes:
  
  Go to transaction RZ10 to adjust the profile parameters for background work processes. Look for the parameter rdisp/wp_no_btc and increase its value to allow more background work processes.
  After making changes, restart the instance for the changes to take effect.
  
  
  
  Review Job Priority Settings:
  
  Check the priority settings of the jobs in transaction SM37 (Job Monitoring). Ensure that high-priority jobs are correctly configured and that their priority is set appropriately.
  
  
  
  Optimize Job Scheduling:
  
  Schedule high-priority jobs during off-peak hours to reduce contention for resources.
  Use transaction SM36 to manage job scheduling and ensure that jobs are distributed evenly across available work processes.
  
  
  
  Monitor System Performance:
  
  Use transaction ST03N to analyze system performance and identify bottlenecks. This can help in understanding if the system is under heavy load and if additional resources are needed.
  
  
  
  Cross-System Configuration:
  
  Ensure that the configuration for background processing is consistent across all systems in the landscape. This includes checking the number of work processes and their distribution.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or patches related to this error message.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM37: Job Monitoring
  SM36: Job Scheduling
  RZ10: Profile Parameter Maintenance
  ST03N: Workload Analysis
  
  
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on background processing and job scheduling.
  
  
  Performance Tuning: Consider engaging with SAP Basis administrators for performance tuning and optimization strategies tailored to your specific environment.
  
  
  By addressing the configuration and resource allocation for background work processes, you should be able to resolve the RT639 error and ensure that high-priority jobs are processed efficiently.