Lost RAM

[init0]

Hello
i faced a problem, i have a server PROXMOX 4.1 with 48 GB of RAM and 2 virtual machines with 16 GB of RAM each.
For unknown reasons i'm running out of RAM on the server, all 48 GB, while the virtual machines shouldn't use more than ~33 GB of RAM.

Screnshots:
Inside PROXMOX node - http://joxi.ru/GrqMz19tN8MwZr
http://joxi.ru/Q2KYKB5C9WV90r
http://joxi.ru/p279q3WT05l0kr
http://joxi.ru/Vrw8P9VFKalKZm
http://joxi.ru/Vm6xJR6Ix7gDKA

Tell me, where RAM may go?
Thank you!

 

[tom]

looks like you use ZFS?

 

[init0]

Yeap, ZFS

 

[fabian]

The default ZFS setup uses up to 50% of the hosts RAM to speedup ZFS operations, check the wiki for how to change this:
https://pve.proxmox.com/wiki/ZFS#Limit_ZFS_memory_usage

 

[init0]

Thank you so much!