Adjusting for Daylight Saving Time DST
MainView for CICS maintains time-related data in various control blocks on the BBI-SS PAS and the CICS regions that are executing MainView for CICS.
This data is used to calculate several durations that are used by monitors and task performance data. If the BBI-SS PAS is not restarted after the DST change, the data might not be updated with the proper time setting. This situation might result in misleadingly large values after the spring-forward time change or negative values after the fall-back change.
Because of the fall-back time change, the FIC2 transaction (which runs every minute in CICS to collect CMR and CICS statistics) might be set to run in the next hour instead of the next minute. The next scheduled transaction would then run every minute.
The spring-forward change might cause the next FIC2 transaction to run immediately, possibly producing one or two FT003W PREVIOUS EXECUTION OF FIC2 IS STILL ACTIVE messages in the CICS job log.
You can avoid misleading or incorrect time-related data (such as overall response time) for tasks or monitors that are active during the timechange, and for the FIC2 scenarios described in this section. BMC recommends that you stop the MainView for CICS BBI-SS PAS, perform the DST time change, and re-start the BBI-SS PAS. If this is not a concern, you do not have to re-start the BBI-SS PAS.