I have a problem with my Hyper-V-Guest, an SLES system, on a Windows 2016 Standard Host. In Hyper-V, I assigned 120000MB of memory to this machine. But if I type
free -m in the SLES guest, I get the following output:
total used free shared buffers cached
Mem: 67961 2038 65923 219 11 807
-/+ buffers/cache: 1219 66742
Swap: 122879 0 122879
So only 66 GB RAM.
I tried turning on/off dynamic memory, NUMA, changed NUMA parameters, but no success. At one time, more memory was shown by
free -m, but after a restart I had the same problem again.
On the Windows host, the memory is allocated, so if I start the VM (no other VMs on this host), I see 124/256 GB in use.
At the moment I am out of ideas.
Edit: I started an Ubuntu machine as guest with the same settings, and it shows the correct amount of RAM. I got the SLES VM as a vmWare Image, and converted the disk file to Hyper-V. I now upgraded the SLES system, which replaced the vmWare specific kernel with a plain one (if I saw that correctly), but the problem is still the same.