N3T_Appl_Reject_Conn_Resource

Requests for new connections are not satisfied by this application because the connection backlog limit has been exceeded. The number of currently active connections is not a high percentage of the high water mark, indicating no spike in application workload. Constrained application system resources are likely causing the z/OS application to be unable to complete the workload.

To determine this, the following metrics in the Connections table are monitored:

• Percent Active Connections
• Backlog connections rejected

This situation occurs if, for one interval, the active connections value is less than the value for 80% of the high water mark and the backlog connections rejected value is greater than 0 (zero). To resolve the problem, use the following steps:

1. Increase application backlog queue limit
2. Use the z/OS Resource Measurement Facility to evaluate workload delay metrics (such as CPU or I/O) for the application address space to determine if possible system resource constraints exist

Formula: Percent Active Connections <= 80 AND Backlog Connections Rejected > 0