Hi Everybody,
I have a cloudstack 4.1 cluster.
Host features goes from two 5-year-old quad core xeon with 4 Gb Ram to two
1-year-old six core hyperthreaded xeon with 32 GB Ram
All hosts run same linux version (3.8.0-19) and same libvirt version (1.0.2)
On one of the smallest host (the "4 Gb ram" ones) I have 2 user VM, each
one with 768 MB ram, and three virtual routers
As far as I know, memory usage should be:
host memory usage (?) + 768 + 768 + 128 + 128 + 128 =
host memory usage + 1920
Infact, when I call the listHosts API, I get 1920 in memoryallocated field.
But, if I log in into host I have:
KiB Mem: 4048996 total, 3605360 used, 443636 free, 14416 buffers
KiB Swap: 4190204 total, 1473024 used, 2717180 free, 107424 cached
that is far more than i expected, on memory usage!
So, the question is: how much memory does hosts need?
The worst is that if i create another user VM on that host, swap usage
becomes consistent and all VMs (and routers) become very slowed
Any idea?
--
Gerolamo Valcamonica
