Linux Performance

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/etc/sysctl.conf settings:

• increase TCP max buffer size setable using setsockopt()

net.core.rmem_default = 8388608
net.core.wmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216

• Increase Linux auto tuning TCP buffer limits: min, default, and max number of bytes to use, set max to at least 4MB, or higher if you use very high BDP paths

net.ipv4.tcp_rmem = 1048576 4194304 16777216
net.ipv4.tcp_wmem = 1048576 4194304 16777216

NIC Optimization

• Find the maximum RX for your NIC, and then set it to that:
  

ethtool -g ethX

ethtool -G ethX rx <your max RX>
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