OMS cache hitrate 
OMS cache hitrate <percentage>%, <number> of <number of> accesses failed
This
message can occur for
liveCache
instances only.
The
hit rate when accessing the
OMS data in the
data cache is
too low. In a running 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:
data cache
OMS versions