Look how VmSize grow in my case (amuled 2.2.6, Linux 2.4.2x, all network activity is disabled (ConnectToKad=0 ConnectToED2K=0):
0 files are hashed
VmSize: 20004 kB
VmLck: 0 kB
VmRSS: 12872 kB
VmData: 11908 kB
VmStk: 76 kB
VmExe: 3032 kB
VmLib: 4772 kB
after 1st file hashed
VmSize: 21844 kB
VmLck: 0 kB
VmRSS: 12980 kB
VmData: 13748 kB
VmStk: 76 kB
VmExe: 3032 kB
VmLib: 4772 kB
after 2nd file shashed
VmSize: 23232 kB
VmLck: 0 kB
VmRSS: 13940 kB
VmData: 15136 kB
VmStk: 76 kB
VmExe: 3032 kB
VmLib: 4772 kB
after 3rd file hashed
VmSize: 24328 kB
VmLck: 0 kB
VmRSS: 13616 kB
VmData: 16232 kB
VmStk: 76 kB
VmExe: 3032 kB
VmLib: 4772 kB
...