when I'm using zman at commandline for assigning (ba) or unassigning (bua) a bundle, it is really slow !!

f.e. one simple windows bundle assign to one user takes about 20 to 60 seconds !!

I'm using ZCM 10.3.1 on SLES11 SP1 (vmware optimized version from Novell) 64 Bit.
the vm runs with VMWare ESXi 4.1 on an 6core Xeon with 2.6GHz and with 8GB of RAM.
the zcm server is the only VM running on this machine...
ZCM runs on the built in Sybase DB. Nothing else is installed on this SLES.

Is there any way to speed up the zman utility??