Excessive memory consumption RAID1 ZFS

[cr_eis]

I have a proxmox 6.4.9 installed in RAID1 ZFS with 40 GB of RAM. On this server 2 VMs are installed, one with 2 GB of RAM and the other with 16 GB of RAM.
Sometimes the VM with 16 GB of RAM is automatically stopped because too much memory is used.
oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/qemu.slice/102.scope,task=kvm,pid=5311,uid=0

I must have a problem with the ZFS RAID settings. Can you tell me the correct ZFS settings.
Thanks

 

[mira]

What's the output of arcstat? Could be that it doesn't release the memory fast enough.
ZFS by default uses up to 50% of available RAM as read cache.

 

[cr_eis]

Here is the result of arcstat

arcstat time read miss miss% dmis dm% pmis pm% mmis mm% size c avail 15:55:26 48 12 25 0 0 12 100 0 0 19G 19G 6.3G

How can i release the memory faster

 

[mira]

You can limit the maximum ARC size, see https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_zfs (3.8.7)

 

[cr_eis]

OK, I will look into it
Thanks