Solution : https://service.sap.com/sap/support/notes/749911 (SAP Service marketplace login required)
Key words :
terms utc syncronization $sync r3trans reason, hour beforedaylight savings time switch, db/2 udb family databases, sap system table caching, data storedin memory, read note 841938 note, local time, table synchronization, symptom notice 640 -, prerequisites notice 640 -
Related Notes :
841938 | DB2/DB4/DB6: Buffer synchronisation between dw, tp & R3trans |