Average SNA response time measured over the last response time collection interval. Response time collection interval is specified on the AvgSampPeriod parameter of MONITORGROUP statement in the TCP/IP profile dataset The SNA response time is calculated by subtracting the Average IP Response Time from the Average Total Response Time.
The most likely causes of a high average SNA response time are an application workload spike or z/OS system resource constraints.
To further investigate system resource constraints, use the z/OS Resource Measurement Facility to evaluate workload delay metrics such as CPU and I/O for both the application and z/OS Communications Server address space to determine if possible system resource constraints exist.
This situation is triggered when the average total response time is greater than .5 seconds.
Formula: Average SNA Response Time > 500