How To Fix RT222 - Number of enqueue work processes

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 222

• Message text: Number of enqueue work processes

What causes this issue?

Technical constraints:
There is exactly one server system-wide with Enqueue work processes. At
least one Enqueue work processes must be running on this server. Only
for very large systems would it be appropriate to configure more than
one work process.
You can set the number of these work processes using the system
parameter <ZH>rdisp/wp_no_enq</>.
You can set the name of the Enqueue server using the system parameter
<ZH>rdisp/enqname</>.
For more information about this topic, see SAP Note 39412 (How many
work processes to configure).

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT222 - Number of enqueue work processes ?

  The SAP error message RT222 indicates that the number of enqueue work processes has reached its limit. This can occur when there are too many enqueue requests being processed, which can lead to performance issues or even system downtime if not addressed.
  Cause:
  
  High Load: A sudden increase in the number of transactions or processes that require enqueue locks can lead to this error.
  Configuration Issues: The number of enqueue work processes may be set too low for the current workload.
  Long-Running Transactions: If transactions are taking too long to complete, they may hold onto enqueue locks longer than necessary, leading to a backlog.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks can also contribute to this issue.
  
  Solution:
  
  
  Increase the Number of Enqueue Work Processes:
  
  You can increase the number of enqueue work processes in the SAP system profile parameters. This is done by modifying the rdisp/wp_no_enq parameter in the instance profile.
  After making changes, restart the SAP instance for the changes to take effect.
  
  
  
  Monitor and Optimize Transactions:
  
  Analyze the transactions that are causing high enqueue usage. Use transaction codes like ST22 (Dump Analysis) and SM21 (System Log) to identify problematic areas.
  Optimize long-running transactions to ensure they complete more quickly and release locks.
  
  
  
  Check for Deadlocks:
  
  Use transaction SM12 to monitor and resolve any deadlocks that may be occurring. Ensure that processes are not waiting indefinitely for locks held by other processes.
  
  
  
  Review System Performance:
  
  Use transaction ST03N to analyze system performance and identify any bottlenecks that may be contributing to the issue.
  
  
  
  Adjust Application Logic:
  
  If specific applications or custom code are causing excessive enqueue requests, consider reviewing and optimizing the logic to reduce the number of locks required.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to enqueue work processes for any specific recommendations or patches that may address known issues.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have experienced similar issues.
  Documentation: Refer to the official SAP documentation for detailed information on configuring work processes and performance tuning.
  
  By addressing the root causes and implementing the suggested solutions, you should be able to resolve the RT222 error and improve the overall performance of your SAP system.