How To Fix RT221 - Number of update2 work processes

RT221 - Overview

• Message type: E = Error

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

• Message number: 221

• Message text: Number of update2 work processes

What causes this issue?

Technical constraints:
There does not necessarily have to be any work processes of the Update
2 type (low-priority update). However, as high-priority updates could
be delayed without them, we recommend that you configure at least one
work process of the Update 2 type for each system.
You can set the number of these work processes using the system
parameter <ZH>rdisp/wp_no_vb2</>.
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.

RT221 - Details

• The SAP error message RT221, which indicates "Number of update2 work processes," typically relates to issues with the configuration or availability of update work processes in the SAP system. This error can occur when the system is unable to allocate the required number of update work processes for handling update requests, which can lead to performance issues or delays in processing.
  Causes:
  
  Insufficient Work Processes: The number of update work processes configured in the system may be too low to handle the current workload.
  System Load: High system load or a large number of concurrent update requests can exhaust the available update work processes.
  
  Configuration Issues: Incorrect configuration settings in the instance profile for update work processes.
  Long-running Transactions: If there are long-running transactions or locks on database tables, it can prevent the update work processes from completing their tasks.
  Resource Constraints: Limited system resources (CPU, memory, etc.) can affect the performance and availability of work