ALR0600E The Port Send Utilization Percentage of port port name in storage system storage system name was measured to be measured value%, which violated the critical-stress boundary value of boundary value%.
Explanation
Port Send Utilization Percentage measures the approximate utilization percentage of the ports in monitored storage systems. This value represents the average percent of time that the ports were busy sending data. A threshold was defined on this metric, which causes the measured value to be compared to the defined boundaries for each set of performance statistics collected from the storage system.
This message indicates that a threshold boundary violation occurred. In this case, the specified port in the storage system has a Port Send Utilization Percentage value that is greater than or equal to the critical-stress boundary that was defined for the related threshold.
Action
The threshold violation might indicate that a performance problem exists for this port. Either the port is experiencing a hardware or software related problem that is causing a drop in performance, or the port is being overloaded with too high a workload. If the workload is too high, moving some of the port's workload to other less busy ports might resolve the problem.
If the Port Send Bandwidth Percentage metric is low or within normal bounds, but the Port Send Utilization Percentage metric is high for this port, then there might be some downstream congestion in the fabric along the datapath for this port. Check to make sure that the related switch ports are operational, and that the server HBA and the related switch ports have similar hardware capabilities as the subsystem port. Less capable ports at the server HBA or at the switches along the data path may artificially restrict the speed, so communication can only go as fast as the slowest link on the path.
However this threshold indication is only as good as its defined boundary values. If the specified boundary value is too low, IBM Spectrum Control might recognize many violations, even though there is really no underlying performance problem with the port. In this case, increase the boundary value in the threshold definition to reduce the number of unnecessary alerts.