How To Fix RT421 - SAP update task V2: Average response time per dialog step

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 421

• Message text: SAP update task V2: Average response time per dialog step

What causes this issue?

The dispatcher distributes the update requests from the appropriate
dispatcher queue to free update work processes. A long dispatcher queue
can be a sign of too few work processes; response times that are too
long, on the other hand, can point to too many work processes that must
share the instance's resources and therefore cause more paging. You
should take account of SAP Note 39412 (How many work processes to
configure).
INCLUDE BC_UPDATE_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 RT421 - SAP update task V2: Average response time per dialog step ?

  The SAP error message RT421, which pertains to the update task V2 and indicates an issue with the average response time per dialog step, typically arises in the context of performance monitoring and system health checks. This error is often related to the performance of the SAP system, particularly in how it handles dialog steps during user interactions.
  Cause:
  
  
  Performance Bottlenecks: The average response time for dialog steps may exceed acceptable thresholds due to various performance bottlenecks in the system. This can be caused by:
  
  High system load due to many concurrent users.
  Inefficient ABAP code or poorly optimized database queries.
  Resource contention (CPU, memory, I/O).
  Network latency or issues with the application server.
  
  
  
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to suboptimal performance.
  
  
  Database Performance: Slow database performance can significantly impact the response time of dialog steps.
  
  
  Background Jobs: Heavy background processing or batch jobs running at the same time can affect the performance of dialog processing.
  
  
  Solution:
  
  
  Performance Analysis:
  
  Use transaction codes like ST03N (Workload Analysis) and ST02 (Tune Summary) to analyze system performance and identify bottlenecks.
  Check the response times for dialog steps and identify any long-running transactions.
  
  
  
  Optimize ABAP Code:
  
  Review and optimize any custom ABAP programs or reports that may be causing delays.
  Use transaction SE30 (Runtime Analysis) to analyze the performance of specific programs.
  
  
  
  Database Optimization:
  
  Ensure that database statistics are up to date.
  Optimize database queries and indexes to improve performance.
  
  
  
  System Configuration:
  
  Review and adjust system parameters in the instance profile to optimize performance.
  Consider increasing the resources allocated to the SAP application server if necessary.
  
  
  
  Load Balancing:
  
  If applicable, distribute the load across multiple application servers to reduce the load on any single server.
  
  
  
  Monitor Background Jobs:
  
  Schedule heavy background jobs during off-peak hours to minimize their impact on dialog processing.
  
  
  
  Network Optimization:
  
  Check for any network issues that may be contributing to latency and address them accordingly.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional insights or patches related to performance issues.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users facing similar issues.
  Performance Monitoring Tools: Consider using SAP Solution Manager or other performance monitoring tools to gain deeper insights into system performance.
  
  By systematically analyzing and addressing the factors contributing to the RT421 error, you can improve the average response time per dialog step and enhance overall system performance.