On a Linux system, you can tune the network stack to increase networking performance by adjusting the size of the buffers used to store incoming and outgoing network packets. There are several parameters that you can adjust to tune the network stack, including:
net.core.rmem_default:
This parameter sets the default receive buffer size for all sockets. You can increase the value of this parameter to allow the system to buffer more data from incoming packets, which can improve performance for high-bandwidth connections.
net.core.wmem_default:
This parameter sets the default send buffer size for all sockets. You can increase the value of this parameter to allow the system to buffer more data for outgoing packets, which can improve performance for high-bandwidth connections.
net.ipv4.tcp_rmem:
This parameter sets the receive buffer size for TCP sockets. You can increase the value of this parameter to allow the system to buffer more data from incoming packets, which can improve performance for high-bandwidth connections.
net.ipv4.tcp_wmem:
This parameter sets the send buffer size for TCP sockets. You can increase the value of this parameter to allow the system to buffer more data for outgoing packets, which can improve performance for high-bandwidth connections.
To tune the network stack on a Linux system, you can use the sysctl command to modify the values of these parameters. For example:
sysctl -w net.core.rmem_default=16777216 sysctl -w net.core.wmem_default=16777216 sysctl -w net.ipv4.tcp_rmem="4096 87380 16777216" sysctl -w net.ipv4.tcp_wmem="4096 87380 16777216"
These commands will increase the default receive and send buffer sizes for all sockets and the receive and send buffer sizes for TCP sockets to 16MB.
It is worth noting that adjusting the buffer sizes can have a significant impact on the system's performance, and it is important to carefully consider the trade-offs before making any changes. In general, it is best to start with small adjustments and gradually increase the values as needed.