How To Fix RT165 - &1 &3 > &2 &3 Utilized area of dispatcher queue exceeds threshold value

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 165

• Message text: &1 &3 > &2 &3 Utilized area of dispatcher queue exceeds threshold value

What causes this issue?

The dispatcher queue of a spool server takes on output requests from the
commit message queue and passes these on to free work processes in the
spool request queue. The threshold value is exceeded if there are not
enough spool work processes available.

How to fix this error?

If it is a question of a general overload, increasing the size of the
the dispatcher queue will not provide a solution. Instead, we recommend
that you increase throughput by reconfiguring the SAP system:
Increase the number of spool work processes for this instance
Improve the distribution of output devices to spool servers
Increase the number of spool servers
If the number of work requests created is more than can be processed
only for a short time, and there is enough time to process all of the
requests between these load peaks, increase the size of the dispatcher
queue in the profile parameter <ZH>rdisp/elem_per_queue</>.
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 RT165 - &1 &3 > &2 &3 Utilized area of dispatcher queue exceeds threshold value ?

  The SAP error message RT165 indicates that the utilized area of the dispatcher queue has exceeded a predefined threshold value. 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 for this error:
  Cause:
  
  High Load on the System: The system may be experiencing a high volume of requests, leading to an increased number of entries in the dispatcher queue.
  Long-Running Transactions: If there are transactions that take a long time to complete, they can occupy space in the dispatcher queue, causing it to exceed the threshold.
  Configuration Issues: The threshold values for the dispatcher queue may be set too low for the current workload.
  Resource Limitations: Insufficient system resources (CPU, memory) can lead to delays in processing requests, causing the queue to fill up.
  
  Solutions:
  
  Monitor System Performance: Use transaction codes like ST03N (Workload Analysis) and ST06 (Operating System Monitor) to analyze system performance and identify bottlenecks.
  Increase Threshold Values: If the current threshold values are too low for your workload, consider increasing them. This can be done in the SAP profile parameters (e.g., rdisp/queuethreshold).
  Optimize Long-Running Transactions: Identify and optimize any long-running transactions that may be causing the queue to fill up. This may involve code optimization or database tuning.
  Scale Resources: If the system is consistently under heavy load, consider scaling up the hardware resources (CPU, memory) or optimizing the existing resources.
  Review Background Jobs: Check for any background jobs that may be consuming excessive resources and adjust their scheduling if necessary.
  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 queue issues for specific patches or recommendations.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have faced similar issues.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  Performance Tuning: Regularly perform performance tuning and monitoring to prevent such issues from occurring in the future.
  
  By addressing the underlying causes and implementing the suggested solutions, you can mitigate the impact of the RT165 error and improve the overall performance of your SAP system.