[ovirt-users] The host xxx did not satisfy internal filter Memory because its available memory is too low

Hi, When I create vm after I have installed ovirt Node 4.1.1 successfully, I got this error message "The host xxxx did not satisfy internal filter Memory because its available memory is too low". I use ovirt node:ovirt-node-ng-installer-ovirt-4.1-2017032304.iso and ovirt-engine-appliance-4.1-20170322.1.el7.centos.noarch.rpm. And I followed the steps in http://www.ovirt.org/node/. I found the informations in "hosts"->"general"->"info" page: "Max free Memory for scheduling new VMs: 356 MB" "Physical Memory: 15747 MB total, 5039 MB used, 10708 MB free" Why the free memory for scheduling new vms is so little? Is there anything wrong with my configuration? Thanks in advance, Yiimao Yang.