Short Description: Specifies the size of the namelookup cache in bytes.
The notes.ini parameter NLCache_Size=n is used to change the Name Lookup Cache from its default size of 16 MB. The value is specified in bytes, so 32 MB would be specified as 33554432. The value is limited by the amount of memory allocated to Domino and you must leave enough memory for other Domino tasks.
There is no kown UI setting for this notes.ini variable. But you can specify this setting in the notes.ini settings tab of the configuration settings document.
IBM Lotus Domino 8.5 performance for IBM Lotus Notes users