iFolder high util

SLES11 SP2 OES11 SP1 on VMware environment. Pure SLES. 5.9 GB RAM, Intel Xeon X5660 2.80 GHz CPU.
Today added first three-four iFolder users from old SLES 10 OES2 server and noticed that SLES on VMware load start to jump for longer period 100%. Probably caused by ifolders sync. Is that normal? Any ideas?
More thanks, Alar.