Hi, I have a question about my tunables for zfs and network configs below and suggestions for better tunnables for better perfomance. I am noticing almost peaks and steep drops in network performance when transferring to my freenas server. I have noticed the network drops occur when I see the LED on my server that shows when data is being written to disk. I will also add hardware I am using any advice or tips would be greatly appreciated. Thx
HP ProLiant N40L Ultra Micro Tower Server
Kingston 4GB 240-Pin DD = 8GB
Port-Channel onboard nic and intel nic
4 x Hitachi GST Deskstar 7K3000 HDS723020BLA642 (0f12115) 2TB 7200 RPM
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vfs.zfs.arc_max 5074190464
kern.ipc.nmbclusters 10000
vfs.zfs.txg.write_limit_override 1073741824
vfs.zfs.vdev.max_pending 8
vfs.zfs.vdev.min_pending 2
kern.ipc.somaxconn 384
kern.ipc.nsfbufs 150000
net.inet.tcp.inflight.enable 1
net.inet.tcp.recvbuf_auto 1
net.inet.tcp.sendbuf_auto 1
net.inet.tcp.delayed_ack 0
net.inet.tcp.sendbuf_max 2097152
kern.ipc.maxsockbuf 2097152
net.inet.tcp.recvbuf_max 2097152
HP ProLiant N40L Ultra Micro Tower Server
Kingston 4GB 240-Pin DD = 8GB
Port-Channel onboard nic and intel nic
4 x Hitachi GST Deskstar 7K3000 HDS723020BLA642 (0f12115) 2TB 7200 RPM
------------
vfs.zfs.arc_max 5074190464
kern.ipc.nmbclusters 10000
vfs.zfs.txg.write_limit_override 1073741824
vfs.zfs.vdev.max_pending 8
vfs.zfs.vdev.min_pending 2
kern.ipc.somaxconn 384
kern.ipc.nsfbufs 150000
net.inet.tcp.inflight.enable 1
net.inet.tcp.recvbuf_auto 1
net.inet.tcp.sendbuf_auto 1
net.inet.tcp.delayed_ack 0
net.inet.tcp.sendbuf_max 2097152
kern.ipc.maxsockbuf 2097152
net.inet.tcp.recvbuf_max 2097152