How To Fix RT164 - Utilized area of dispatcher queue (percentage)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 164

• Message text: Utilized area of dispatcher queue (percentage)

Output requests on the spool server are buffered in the dispatcher
queue until they can be passed on to a free work process.
INCLUDE BC_SPOOL_MOREINFO OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT164 - Utilized area of dispatcher queue (percentage) ?

  The SAP error message RT164 indicates that the utilized area of the dispatcher queue has reached a certain percentage threshold. This can lead to performance issues or even system instability if not addressed. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  High Load on the System: The dispatcher queue may be experiencing a high volume of requests, leading to increased utilization.
  Long-Running Processes: If there are processes that take a long time to complete, they can occupy space in the dispatcher queue.
  Insufficient Resources: The system may not have enough resources (CPU, memory) to handle the current workload efficiently.
  Configuration Issues: Incorrect configuration of the SAP system parameters related to the dispatcher and work processes can lead to inefficient handling of requests.
  
  Solutions:
  
  Monitor System Performance: Use transaction codes like ST03N (Workload Analysis) and ST06 (Operating System Monitor) to analyze system performance and identify bottlenecks.
  Increase Dispatcher Queue Size: If the system is consistently reaching high utilization, consider increasing the size of the dispatcher queue. This can be done by adjusting the profile parameters in the instance profile (e.g., rdisp/queuethreshold).
  Optimize Long-Running Transactions: Identify and optimize any long-running transactions or background jobs that may be clogging the dispatcher queue.
  Scale Up Resources: If the system is under heavy load, consider scaling up the hardware resources (CPU, memory) or optimizing the existing resources.
  Review Configuration: Check the configuration settings for the dispatcher and work processes to ensure they are set appropriately for the expected workload.
  Load Balancing: If applicable, consider implementing load balancing across multiple application servers to distribute the workload more evenly.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to dispatcher performance and tuning for specific recommendations and updates.
  SAP Community: Engage with the SAP Community forums for insights and experiences from other users who may have faced similar issues.
  Documentation: Refer to the official SAP documentation for guidelines on performance tuning and dispatcher configuration.
  
  Preventive Measures:
  
  Regularly monitor system performance and dispatcher queue utilization.
  Conduct periodic reviews of system configurations and workloads.
  Implement alerts for high utilization thresholds to proactively address issues before they escalate.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the impact of the RT164 error and improve the overall performance of your SAP system.