zfs_resilver_delay - Permission denied (parameter doesn't exist?)

[alpha754293]

I am trying to speed up my resilvering process as I am expanding one of my raidz2 vdevs from being 8x HGST 6 TB SATA 6 Gbps 7200 rpm HDDs to 8x WD DC520 12 TB SAS 12 Gbps 7200 rpm HDDs.

From this reddit post, it suggested that I tried to set these ZFS module parameters to achieve this goal:

echo 0 > /sys/module/zfs/parameters/zfs_resilver_delay
echo 512 > /sys/module/zfs/parameters/zfs_top_maxinflight
echo 8000 > /sys/module/zfs/parameters/zfs_resilver_min_time_ms

However, when I tried to execute the first step, I get:

-bash: /sys/module/zfs/parameters/zfs_resilver_delay: Permission denied

When I checked the /sys/module/zfs/parameters folder, that parameter doesn't exist.

Is that by design or is this an issue with my system?

Here is the output of my package versions:

proxmox-ve: 7.4-1 (running kernel: 5.15.149-1-pve)
pve-manager: 7.4-17 (running version: 7.4-17/513c62be)
pve-kernel-5.15: 7.4-12
pve-kernel-5.15.149-1-pve: 5.15.149-1
pve-kernel-5.15.143-1-pve: 5.15.143-1
pve-kernel-5.15.74-1-pve: 5.15.74-1
ceph-fuse: 15.2.17-pve1
corosync: 3.1.7-pve1
criu: 3.15-1+pve-1
glusterfs-client: 9.2-1
ifupdown2: 3.1.0-1+pmx4
ksm-control-daemon: 1.4-1
libjs-extjs: 7.0.0-1
libknet1: 1.24-pve2
libproxmox-acme-perl: 1.4.4
libproxmox-backup-qemu0: 1.3.1-1
libproxmox-rs-perl: 0.2.1
libpve-access-control: 7.4.3
libpve-apiclient-perl: 3.2-2
libpve-common-perl: 7.4-2
libpve-guest-common-perl: 4.2-4
libpve-http-server-perl: 4.2-3
libpve-rs-perl: 0.7.7
libpve-storage-perl: 7.4-3
libspice-server1: 0.14.3-2.1
lvm2: 2.03.11-2.1
lxc-pve: 5.0.2-2
lxcfs: 5.0.3-pve1
novnc-pve: 1.4.0-1
proxmox-backup-client: 2.4.6-1
proxmox-backup-file-restore: 2.4.6-1
proxmox-kernel-helper: 7.4-1
proxmox-mail-forward: 0.1.1-1
proxmox-mini-journalreader: 1.3-1
proxmox-widget-toolkit: 3.7.3
pve-cluster: 7.3-3
pve-container: 4.4-6
pve-docs: 7.4-2
pve-edk2-firmware: 3.20230228-4~bpo11+3
pve-firewall: 4.3-5
pve-firmware: 3.6-6
pve-ha-manager: 3.6.1
pve-i18n: 2.12-1
pve-qemu-kvm: 7.2.10-1
pve-xtermjs: 4.16.0-2
qemu-server: 7.4-5
smartmontools: 7.2-pve3
spiceterm: 3.2-2
swtpm: 0.8.0~bpo11+3
vncterm: 1.7-1
zfsutils-linux: 2.1.15-pve1

Any help or insight as to why this ZFS module parameter appearing to be absent from my system is greatly appreciated.

Thank you.

P.S. I'm running Proxmox 7.4-17 with the 5.15.149-1 Linux kernel.

Hardware specs:
2x Intel Xeon E5-2697A v4
Supermicro X10DRi-T4+
16x Crucial DDR4-2666(?) ECC Reg. RAM running at DDR4-2400 speed (I think? I can't remember anymore)
Broadcom/Avago/LSI 9361-8i MegaRAID SAS 12 Gbps HW SAS RAID HBA
RTX A2000 6 GB
Mellanox ConnectX-4 dual VPI port 100 Gbps IB NIC
4x HGST 3 TB SATA 3 Gbps 7200 rpm HDDs for the Proxmox OS itself (in HW RAID6)
8x HGST 6 TB SATA 6 Gbps 7200 rpm HDDs for VM/CT disks (raidz2)
8x HGST 6 TB + 8x 10 TB + 8x 10 TB HDDs for bulk storage (one pool, three raidz2 vdevs)
Supermicro 4U 36-bay server.

*edit*
It would appear that the ZFS module parameter zfs_top_maxinflight also doesn't exist in /sys/module/zfs/parameters, in Proxmox 7.4-17.