Recently I've been reading a lot of confusion about ZFS consuming tons of RAM.
Solution is very simple, to create zfs module configuration file and set desired amount of memory, according to rule (4G + "amount of total TB in pools" * 1GB).
All this can be pretty confusing and it is pretty much "one time" operation, that requires ton of reading to be set properly.
To simplify matter I wrote script that does everything itself and allows either to set size manually or set recommended size automatically.
Script is pretty much ready to work, but if you require to set another zfs.conf location or name, do edit mod_config variable.
If your install has pve folder other than /etc/pve (which is highly unlikely), then edit pve_dir variable.
- download
- run as root (because /etc/modprobe.d is owned by root and config needs to go there)
evaluated cache size - shown by script is data evaluated with sum of pool sizes present on system using formula above.
recommended cache size - takes in account wether evaluated cache size is less than recommended 8GB minimum. In other words: If evaluated cache size gets below 8GB it will recommend you set 8GB, in other case it will recommend evaluated value.
- add ability to remove value from zfs.conf
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