Evaluating Path Busy Conditions and taking Actions to Reduce Them

When evaluating the occurrence of path busy conditions, remedial action is generally not required unless the percentage of requests that experienced one or more busy conditions (count of count of requests that experienced one or more path busy conditions divided by the total number of coupling facility requests) is greater than 10%.

You can reduce the impact of excessive path busy conditions through one or more of the following:

Add more shared coupling CHPIDs that connect to the coupling facility to increase the total number of link buffers that are available to the sharing z/OS LPARs.
Decrease the "extent of sharing" of the coupling CHPIDs. Consider sharing the same number of coupling CHPIDs across fewer z/OS LPARs, or even dedicating coupling CHPIDs to just one z/OS LPAR.
Attempt to eliminate one or more of the configuration or workload conditions described above that might affect the occurrence of path busy conditions.