sorry it's your VM,  symstat has never caused a server to lock up for me.
I ran   #symstat -sid xx -i 10 -c 1 -type requests -sa all  on my windows 2003 management server (VM).   After running this command cmd prompt froze and I cant get back into the VM now , its pingable but I think I've messed up something by running the symstat command .  Is tht command appropriate ?
Symstat froze management server !!