Solution : https://service.sap.com/sap/support/notes/431157 (SAP Service marketplace login required)
Key words : 
yt_selection_keys  structure  swotobjid     optionalthe tables parameter xt_hitlist, xt_hitlist_keys    structure  swotobjid    optionaltables, isufinder business object type, business partner hit list, form finderhits_in_separate_memory      changing sepmem, ebagen-kennzx default spacetables, finder hit list, internal user mode, work process switches, application server performance
Related Notes : 
       
| 311158 | CIC0: Memory consumption through finder hit list |