OMS history cache hitrate <percentage>%, <number> of <number of> accesses failed
This message can occur for SAP liveCache databases only.
The hit rate when accessing history data (links to undo log entries for the objects) in the data cache is too low. In a running SAP liveCache application, the hit rate should not fall below 100%, otherwise the data must be read physically.
The hit rate may fall for short periods of time, for example, when objects are accessed for the first time.
Check the following points:
The data cache load
The size of the plan version
Long-running OMS versions
Configuration of the SAP liveCache database and the hardware
Concepts of the Database System, How Databases Log Data Changes