Attempts to increase networking performance on Mac OS 10.6

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.