Comment 1 for bug 1627745

slave-01:
    Host node-3
    Roles:
       Hiera:
           - primary-controller
       Nailgun:
           - controller
    Memory:
       RAM:
          used 2709
          cached 61
          free 82
          shared 56
          total 3008
          buffers 216
       SWAP:
          total 3071
          free 472
          used 2599

this is the same issue with lack of the memory and heavy swap usage for controllers we faced on 10.0.main.ubuntu.smoke_neutron and master.puppet-openstack.fuel-library.pkgs.ubuntu.smoke_neutron tests.

please feel free to update the original bug with more descriptive information from logs.