Sysview for Db2 (IDB2) has an IQL exception displaying a thread that is not in Thread History for the same timeframe.
Release : 20.0
DB2 ZPARM ACCUMAC being set to a high value (i.e. 10)
With DB2 ZPARM ACCUMAC set at ten (ACCUMAC=10), there is always a chance that history could be missing the explicit thread's QMDA-PRODUCT (Prd ID) value due to the rollup (every tenth) record (based on enduser ID and wkstation) not containing the same QMDA-PRODUCT (Prd ID).