How To Fix RT136 - Average usage of dispatcher wait queue for dialog work processes

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 136

• Message text: Average usage of dispatcher wait queue for dialog work processes

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RT136 - Average usage of dispatcher wait queue for dialog work processes ?

  The SAP error message RT136 indicates that the average usage of the dispatcher wait queue for dialog work processes has exceeded a certain threshold. This typically means that the system is experiencing performance issues, particularly with the handling of dialog requests. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  High Load on the System: A large number of concurrent users or processes can lead to an increased load on the dialog work processes, causing them to wait longer in the queue.
  Insufficient Dialog Work Processes: If the number of dialog work processes is too low for the volume of requests, it can lead to bottlenecks.
  Long Running Transactions: If certain transactions take a long time to complete, they can block other requests from being processed.
  Resource Contention: Other system resources (like CPU, memory, or I/O) may be under pressure, affecting the performance of dialog work processes.
  Configuration Issues: Incorrect configuration of the SAP system parameters related to the dispatcher and work processes can lead to inefficiencies.
  
  Solutions
  
  Increase Dialog Work Processes: If the system is consistently hitting the threshold, consider increasing the number of dialog work processes in the instance profile. This can be done via transaction RZ10 or RZ11.
  Optimize Long Running Transactions: Identify and optimize any long-running transactions that may be causing delays. Use transaction ST05 (SQL Trace) or ST12 (Performance Analysis) to analyze performance.
  Monitor System Performance: Use transaction ST03N to monitor workload and performance. This can help identify peak usage times and problematic transactions.
  Check System Resources: Ensure that the underlying hardware resources (CPU, memory, disk I/O) are sufficient and not being overutilized. Consider upgrading hardware if necessary.
  Adjust Dispatcher Settings: Review and adjust dispatcher settings in the instance profile. Parameters like rdisp/queuethreshold can be tuned to better manage the wait queue.
  Load Balancing: If you are running a distributed system, ensure that the load is balanced across multiple application servers to prevent any single server from becoming a bottleneck.
  Review Background Jobs: Check for any background jobs that may be consuming excessive resources and adjust their scheduling if necessary.
  
  Related Information
  
  Transaction Codes:
  
  RZ10: Profile maintenance
  RZ11: Parameter maintenance
  ST03N: Workload analysis
  ST05: SQL Trace
  ST12: Performance analysis
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to dispatcher performance.
  SAP Community: Engage with the SAP Community for insights and shared experiences from other users who may have faced similar issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can help mitigate the RT136 error and improve the performance of your SAP system.