073eee46_n_Memory_Columnar_Store__IMCS___Recommendations
[Parameter name] imcs.autoload [Description] Automatically loads data in columnar store when it is accessed first time by any query [Default value] true [Recommendations] 
Loading data from large table can take substantial amount of time and so increase execution time of the query initiated this load. It can confuse an user which expects this query to complete very fast. In such case explicit load of data after server restart can be more desirable (it can be completed before receiving any user's query).
In-Memory Columnar Store (IMCS)
Recommendations