Use
The hit rates for the
Procedure
Choose Instance ® Information ® Caches.
Name |
Cache name |
Accesses |
Total number of accesses |
Successful |
Number of successful accesses |
Unsuccessful |
Number of unsuccessful accesses |
Hit Rate (%) |
Hit rate (number of hits as a percentage of the total number of accesses) |
The data cache hit rate should be at least 99% and the converter cache hit rate should be at least 98%.
Lower hit rates can occur for a short time, for example when tables are read for the first time, or when repeated table scans are being performed and the table does not fit into 10% of the data cache.
If the values are permanently lower than the recommended percentage, this is a sign of poor performance and the settings of the database parameters DATA_CACHE and/or CONVERTER_CACHE must be increased.