While attempting to boost network block transfer performance, I made some changes to nvram boot-args and /etc/sysctl.conf
nvram boot-args
boot-args maxloreserve=425 ncl=131072 initmcl=131072 nbuf=131072
sysctl.conf
# boot time only: DONT WORK
# kern.ipc.maxsockets=2048
# kern.ipc.nmbclusters=131072
# regular net options:
#net.inet.tcp.delayed_ack=0
kern.maxfiles=204800
#kern.ipc.maxsockets=204800
# Max backlog size, def 128
kern.ipc.somaxconn=4096
#kern.ipc.maxsockbuf=16777216
#kern.ipc.maxsockbuf=1572864
# previous entry:
#kern.ipc.maxsockbuf=8388608
# current:
#kern.ipc.maxsockbuf=33554432
#net.inet.tcp.sendspace=786432
#net.inet.tcp.recvspace=786432
# current :
#net.inet.tcp.sendspace=262144
#net.inet.tcp.recvspace=262144
#net.inet.tcp.sockthreshold=0
#net.smb.fs.tcpsndbuf=262144
#net.smb.fs.tcprcvbuf=262144
kern.sysv.shmmax=16777216
kern.sysv.shmmin=1
kern.sysv.shmmni=32
kern.sysv.shmseg=8
kern.sysv.shmall=4096
kern.ipc.maxsockbuf=4194304
#kern.ipc.somaxconn=2048
#kern.ipc.nmbclusters=2048
net.inet.tcp.rfc1323=1
net.inet.tcp.win_scale_factor=4
net.inet.tcp.sockthreshold=16
net.inet.tcp.sendspace=1042560
net.inet.tcp.recvspace=1042560
net.inet.tcp.mssdflt=1448
net.inet.tcp.msl=15000
net.inet.tcp.always_keepalive=0
net.inet.tcp.delayed_ack=3
net.inet.tcp.slowstart_flightsize=20
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1
net.inet.icmp.icmplim=50
I doubt that it is all correct at this point. I’ve noticed network interface resets.