The queues on the overview screen are yellow or red

Problem:
One or more queues in the messaging section of the overview screen are shown in yellow or red.
Symptom:
Highlighting of queues helps identify backups processing outbound work. If a queue is highlighted yellow, it means that the queue depth has reached the configured warning level for processing. If a queue is highlighted red, the queue depth has reached the configured critical level for processing.
Solution:
Perform one or more of the following tasks:
  • Increase the number of listener threads on the appropriate WebSphere® MQ listener port. This helps in processing more work requests concurrently.
  • Increase the warning and critical level to best reflect the processing throughput.