Comment 5 for bug 1576067

This seems like a legitimate assumption:
https://ask.openstack.org/en/question/91577/horizon-slow-causes/

the link above is related to a MOS deployment and concerns the 'workers' configuration of openstack services running on the controllers - it seems each service will run one worker for each cpu core and this leads to swapping, in MOS 9.0 my 3 controllers have 24GB RAM and 24 cores, disk swapping happens at rest immediately after deployment. this should be a critical fix as it could break disks.