SAP Virtual Machine Doesn't Utilize All the Physical Memory

Hi! I have deployed SAP IDES ECC 6.0 for Oracle on VMWare Workstation with Windows 2003.
There are 16 GB of RAM in the host. Out of them I assign 14 Gb for the virtual machine .

http://www.imageup.ru/img217/942061/1.jpg

The system is working, but response time is not satisfactory.

Task Manager shows the virtual machine uses only 14679260-12535540 = 2143720 byte of physical memory and the rest 12 GB remain Available.
Meanwhile 18 Gb is committed. Performance counters display high load of disk system.

How can I make SAP+Oracle utilize physical memory to the maximum?