cluster performance degradation

[toto-ets]

because now I'm out of money, what is the exact value of 32G to put in the file /etc/modprobe.d/zfs.conf

 

[UdoB]

From one of my nodes, just adjust:

~# cat /etc/modprobe.d/zfs.conf 

#
#  4 GiB = 4294967296
#  8 GiB = 8589934592
# 12 GiB = 12884901888
# 16 GiB = 17179869184
# 24 BiB = 25769803776
# 32 GiB = 34359738368
#
# Nicht vergessen:
# update-initramfs -u 
 
options zfs zfs_arc_min=8589934592
options zfs zfs_arc_max=17179869184

To calculate such numbers by yourself:

$ echo "32 * 1024 * 1024 * 1024" | bc
34359738368

 

[toto-ets]

in my /etc/modprobe.d/zfs.conf file I only find
options zfs zfs_arc_max= ...... I also have to insert options zfs zfs_arc_min

 

[UdoB]

in my /etc/modprobe.d/zfs.conf file I only find
options zfs zfs_arc_max= ...... I also have to insert options zfs zfs_arc_min

You do not need to; my file is just an example

The default is described this: https://openzfs.github.io/openzfs-docs/Performance and Tuning/Module Parameters.html#zfs-arc-min