Why ram usage higher than allowed in vms?

[ozgurerdogan]

On a 32 GB server, I give 3 gb for each machine of 6. So 6*3 = 18 GB but total ram usage is around 26 GB
What is the point here? (Not using ballooning.)

 

[Rhinox]

Not again...

 

[mbaldini]

Buffers
ZFS ARC cache
Other system processes
and so on...

If you use ZFS, check with arc_summary how much RAM is being used by ZFS ARC cache, if you want you can limit it in /etc/modprobe.d/zfs.conf with options zfs zfs_arc_max= <MAX RAM IN BYTES>

 

[ozgurerdogan]

Thanks that was what I was missing. Using zfs...