View source for Proxmox and memory


= Docs =

*[https://pve.proxmox.com/wiki/Dynamic_Memory_Management Dynamic Memory Management] 

= Clues =

== pvesh ==

 pvesh get /cluster/resources

Get current configuration of VM 105

 pvesh get /nodes/nuc/qemu/105/status/current

Now to get maxmem given to VM 105

 pvesh get /nodes/nuc/qemu/105/status/current --output-format json | jq '.maxmem'

Get memory usage

 pvesh get /cluster/resources --output-format json |jq '.[] | select(.id=="qemu/105") | .mem'
  [[Category:Proxmox]]      


=FAQ=
== virtio_balloon virtio0: Out of puff! Can't get 1 pages ==

 Out of memory: Kill process 10429 (java) score 126 or sacrifice child

PVE host ran low on memory, and started reclaiming memory from ballooning drivers. 
See [https://pve.proxmox.com/pve-docs/chapter-qm.html#qm_memory QM Memory].
To prevent this, make sure to set 'Minimum memory' high enough.

== a used vhost backend has no free memory slots left ==
https://forum.proxmox.com/threads/hotplug-memory-limits-total-memory-to-44gb.30991/#post-154914

===Checking===
 cat /sys/module/vhost/parameters/max_mem_regions
===To adjust===
 echo "options vhost max_mem_regions=509" >> /etc/modprobe.d/vhost.conf
"and then reboot"

[[Category:Proxmox]]