Understanding the history data sets

The CICS® VR server uses temporary history data sets which are dynamically allocated with ddname DWWHIST.

The data from these data sets is flushed to the current DWWMSGx data set when the history scavenger runs. The history data sets are not catalogued.

You can run the history scavenger dynamically if the hourly run is not sufficient by using the SETSMS command, or using the CICS VR ISPF dialog interfaceCICS VR ISPF dialog interface, to specify SCAVENGE(HISTORY) in the CICSVR_GENERAL_CONTROL() string.