Low converter cache hit rate 
Low converter cache hit rate
Low converter cache hit rate_ <percentage> % <number of> accesses, <number> successful, <number> not successful
Explanation
The hit rate for accessing the converter cache, where the assignment of logical to physical data pages is administered, is too low. For a balanced database application the converter cache hit rate should be at least 98%. If the converter cache is too small additional I/Os may be required as the system must search the converter cache to determine the physical position of data pages not in the data cache.
User action
Increase the size of the converter cache using the XPARAM parameter CONVERTER_CACHE.