ram usage

I have 64 GB ram in my server. As ZFS is configured to utilize maximum RAM, I tried to reduce with following config in /etc/modprobe.d/zfs.conf to around 8 GB options zfs zfs_arc_min=8388608 options zfs zfs_arc_max=8388608 but still zfs was using 28 GB.

I check CPU Summary from the Node then there always showing Ram usage High, But when I check it from individual VM summary then it's normal. So, Which is the correct report ? and how to solve the node summary ram high usage problem? Proxmox Node Summary Ram Usage showing= 94%+ Every Individual...