If the tick box is selected, then the data value of the Parameter will be stored in memory for the duration of the time the GLU.Engine is running. If the GLU.Engine is restarted then the data will be lost. This can be used in conjunction with the “Run on startup” feature to populate data to be used for all API/Transactions in the GLU.Engine.

Data which is saved in the cache will be available to all APIs in the GLU.Engine.
To reference cached values, use the following GLU Reserved Words in a Derived Parameter:
SET_DATA_TO_CACHE
GET_DATA_FROM_CACHE
GET DATA FROM CACHE CONTAINS
GET MAPPED ARRAY FROM CACHE