Record type 7 (X'07') — Data Lost

If all SMF buffers become full (either a result of no available output data sets for SMF to write to OR the system generating records at a rate faster than SMF can physically write them), SMF data will be lost. When this condition occurs, record type 7 tracks the number of lost records. It contains a count of the SMF records that were not written and the start and end times of the period when data was lost. (The end time is the time recorded in SMF7TME at offset 6).

Record type 7 is not built until SMF buffers become available again. Data existing in the SMF buffer, prior to data lost, is written to available SMF data sets before record type 7 is written to a data set.