Acceptance environment
DB2 10.5
Windows 2012 R2

I'm looking at Resource Monitor and I see something strange for db2syscs.exe process:
Commit (KB): 8,739,000
Working Set (KB): 3,802,000

As I understand it, DB2 uses almost 4 GB of virtual memory, which means paging. On all other servers (but DB2 9.7) almost all the memory is physical, which means RAM.
Are there any changes on DB2 10.5 memory allocations? Am I missing something?