I would like understand the monitor console system CPU Utilisation %, Memory Utilisation%

hello,

      I would like understand the monitor console system CPU Utilisation % because it seemes to me the memory very high.
And I would like reduce it.

Screen TOP 10 Process I'll join you the screen shot of it.

The description is :

Process ID, Command, Cpu Utilization (%), Cpu Total (seconds), resident Size (Kb), Virtual Size (Kb), Owner

I see on line 3,4,5 etc.. of the screen the process

I see several process with a resident memory very high then I would like 

   - first, retrieve the contains of these process next by OEM or others solutions to retrieve these query :

11093, Cpu=732, Resident Size (KB) 1,857,348 Resident Size (KB) 7,495,704  I assume (7Go )