21.5.7 Tuning the buffer length for registry information

This section explains tuning of the buffer length for registry information (pd_registry_cache_size operand value).

Information to be referenced
See the following system activity statistical information provided by the statistics analysis utility:
  • Registry cache hits count (# OF REGISTRY CACHE HIT)
  • Number of registry information acquisition requests (# OF REGISTRY GET REQ)
Tuning procedure
Determine the registry cache hits rate using the following formula, and adjust the buffer length to achieve a hits rate of 100%.
Registry cache hits rate (%) =
(registry cache hits count[Figure] registry information collection requests count)[Figure] 100
Actions to be taken
Increase the value of the pd_registry_cache_size operand.